This gold mining terms glossary covers the words and phrases you will hear on the creek, read in prospecting forums, and see in mining regulations. Whether you are reading a BLM casual use policy, shopping for equipment, or listening to an experienced panner explain where gold settles in a stream, knowing the terminology makes the conversation click. We have kept the definitions practical and focused on what recreational prospectors actually need to know.
For a hands-on introduction to gold panning, see our getting started with gold panning guide. For equipment recommendations, see our best tools for gold panning.
TL;DR
- This glossary covers over 80 gold mining and prospecting terms organized alphabetically.
- Definitions are written for recreational prospectors, not mining engineers.
- Terms cover geology, equipment, techniques, legal/regulatory vocabulary, and gold types.
- Use Ctrl+F (or Cmd+F on Mac) to search for a specific term.
Gold Mining Terms Glossary: A to Z
A
Alluvial gold: Gold found in sediments deposited by flowing water (rivers, creeks, streams). Same as placer gold. Alluvial deposits form when gold erodes from lode sources and is transported and concentrated by water. This is the type of gold recreational panners target.
Amalgamation: A historical gold recovery method using mercury to bind with gold particles, forming an amalgam. The amalgam is then heated to vaporize the mercury, leaving the gold. Largely abandoned due to mercury’s toxicity and environmental damage. Illegal for recreational prospectors in most jurisdictions.
Assay: A chemical test to determine the gold content of a rock or ore sample, typically reported in troy ounces per ton or grams per tonne. Used in commercial mining to evaluate ore deposits. Not relevant to recreational hand panning.
Au: The chemical symbol for gold on the periodic table (from the Latin “aurum”). Atomic number 79.
B
Bedrock: The solid rock layer beneath loose gravel, sand, and soil in a stream. Gold sinks through loose material until it hits bedrock, making bedrock crevices the best place to find concentrated gold. Cleaning out bedrock cracks with a crevicing tool is one of the most productive techniques for recreational panners.
Bench deposit: An ancient river gravel deposit found above the current stream level, left behind when the river cut deeper into its channel. Bench deposits can contain gold from a period when the river flowed at a higher elevation. Sometimes very productive.
Black sand: Heavy dark sand composed primarily of magnetite (iron oxide) and sometimes hematite. Black sand concentrates in the same areas as gold because both are heavy. Finding black sand in your pan is a good indicator that you are in the right spot, though black sand does not guarantee gold is present. Use a magnet to separate magnetite from your concentrate. See our dealing with black sand guide.
BLM (Bureau of Land Management): The federal agency that manages 245 million acres of public land, primarily in the western US and Alaska. BLM land is the most panning-friendly federal land type. Casual use prospecting (hand tools, no significant disturbance) is allowed without a permit on open BLM land.
Boom town: A town that sprang up rapidly during a gold rush, often disappearing just as quickly when the gold ran out. Deadwood (South Dakota), Virginia City (Montana), and South Pass City (Wyoming) are examples.
Byproduct gold: Gold recovered as a secondary product from mining another metal, typically copper. The Bingham Canyon copper mine in Utah produces roughly 500,000 ounces of gold per year as a byproduct.
C
Casual use: A BLM and US Forest Service regulatory term for prospecting activities that cause no or negligible disturbance to public land. Hand panning, hand shoveling, and using a non-motorized sluice box generally qualify as casual use. Casual use does not require a permit or notification. Activities beyond casual use require a Notice of Intent or Plan of Operations. See our gold panning laws in the United States guide.
Classifier: A screen or sieve used to sort material by size before panning. Removing large rocks and gravel from your material makes panning faster and more effective. Common mesh sizes are 1/2 inch, 1/4 inch, and 1/8 inch. Finer classifiers (1/12 inch, 1/20 inch) are used for fine gold recovery.
Claim: See “Mining claim.”
Color: Slang for visible gold in your pan. “Getting color” means finding gold. “Good color” means finding a meaningful amount. A single tiny flake counts as color.
Concentrate: The heavy material remaining in your pan or sluice after lighter material has been washed away. Concentrate contains black sand, gold (if present), and other heavy minerals. Many panners save their concentrate and process it carefully at home for maximum gold recovery. See our fine gold recovery guide.
Crevicing: The technique of cleaning gold out of cracks and crevices in bedrock using a crevicing tool (a bent screwdriver, spoon, or purpose-built pick). One of the most productive techniques for recreational panners because gold accumulates in bedrock cracks over long periods.
D
Deposit: Any natural accumulation of gold or other minerals. Placer deposits are in stream gravels. Lode deposits are in solid rock.
Dredge: A machine that sucks gravel and water from a streambed, processes it through a sluice box, and returns the tailings. Suction dredges are classified by hose diameter (2-inch, 4-inch, etc.). Dredging requires permits in virtually every state and is banned in California. See our guide to permits and access.
Driftless Area: A region of southwestern Wisconsin, southeastern Minnesota, northeastern Iowa, and northwestern Illinois that was not covered by the most recent glaciation. Relevant to prospectors because the Driftless Area lacks glacial gold deposits found in surrounding glaciated regions.
Dry washing: A method of recovering gold without water, using air flow to separate heavy gold from lighter material. Common in desert prospecting (Arizona, Nevada, Southern California) where water is scarce.
E
Eluvial deposit: Gold that has weathered out of a lode source but has not been transported far by water. Found on hillsides and slopes near the source rock. Less common target for panners but can be productive near exposed quartz veins.
F
False bedrock: A hard, compacted layer of clay or cemented gravel in a stream that acts like bedrock, trapping gold above it. Gold can accumulate on false bedrock just as it does on true bedrock. Dig through false bedrock layers to check for additional gold below.
Fine gold: Very small gold particles, often called “flour gold” at the smallest sizes. Fine gold is difficult to recover because it can float on water surface tension or wash out of a pan. Requires careful technique and fine gold recovery tools (snuffer bottle, spiral pan). Most gold found by recreational panners east of the Rockies is fine gold.
Flake: A flat, thin piece of gold, typically 1-3mm in diameter. Larger than flour gold but smaller than a picker. The most common form of placer gold found by recreational panners.
Float: Pieces of rock that have broken off from an outcrop and been transported downhill by gravity, water, or ice. Quartz float with visible gold can indicate a lode source uphill. Following float upstream can lead you to the source vein.
Flour gold: Extremely fine gold dust, often too small to pick up individually. Requires a snuffer bottle or careful panning technique to recover. Common in glacial deposits (Wisconsin, Michigan, Minnesota, Vermont) and in rivers far from lode sources.
Fool’s gold: Pyrite (iron sulfide, FeS2). A brassy yellow mineral commonly mistaken for gold by beginners. Pyrite is harder than gold (scratches glass), brittle (shatters when struck), and lighter. Real gold is soft, malleable, and much heavier. Pyrite in a stream can indicate gold-bearing geology nearby but is not valuable itself.
G
Ghost town: An abandoned settlement, often from a mining boom that went bust. South Pass City (WY), Virginia City (MT), Bodie (CA), and Columbia (CA) are preserved gold rush ghost towns open to visitors.
Glacial gold: Gold transported and deposited by glaciers during the Pleistocene ice ages. The Laurentide Ice Sheet carried gold from the Canadian Shield and deposited it across the northern US (Wisconsin, Michigan, Minnesota, Ohio, Indiana, Vermont, New Hampshire). Glacial gold is typically very fine flour gold.
Gold belt: A geological zone where gold deposits are concentrated. Examples include Virginia’s gold-pyrite belt (15 counties), the Carolina Slate Belt, California’s Mother Lode belt, and Georgia’s Dahlonega gold belt.
Gold pan: The basic tool for recreational gold panning. A shallow, wide pan (typically 10-14 inches in diameter) with angled sides and riffles used to wash away lighter material and concentrate heavy gold. Plastic pans (typically green or blue) are preferred over metal because gold is easier to see against the colored background.
Greenstone belt: An ancient (Precambrian) volcanic and metamorphic rock formation that commonly hosts gold deposits. Greenstone belts are the source of gold at South Pass, Wyoming, and in many Canadian and Australian gold districts.
Grubstake: Money or supplies provided to a prospector in exchange for a share of any gold found. A historical arrangement common during gold rush eras.
H
Hardrock mining: Mining gold from solid rock (lode deposits) rather than from stream gravels (placer deposits). Requires drilling, blasting, and ore processing. Not a recreational activity.
Highbanker: A portable sluice box with an attached hopper and water pump. Material is shoveled into the hopper, and pumped water washes it through the sluice. Highbankers process more material than hand panning but require motorized pumps, which triggers permit requirements in most states.
HPA (Hydraulic Project Approval): A permit required in Washington state from the Department of Fish and Wildlife for any activity that alters a stream bed or flow, including suction dredging. See our Washington gold panning laws.
I
Inside bend: The inner curve of a river bend where water velocity slows. Gold concentrates on inside bends because slower water drops heavier material. Inside bends and the gravel bars that form on them are primary targets for panners.
K
Karat: A measure of gold purity. Pure gold is 24 karat. 18 karat is 75% gold. 14 karat is 58.3% gold. Natural placer gold is typically 80-95% pure (roughly 19-23 karat), with silver and other metals making up the balance. Gold purity varies by location.
L
Lode: A gold deposit in solid rock, typically in quartz veins. Lode gold is the original source of placer gold. As lode deposits erode, gold particles are released and transported by water into streams, where they become placer deposits.
LR2000: The BLM’s Mineral and Land Records System, an online database where you can check for active mining claims on federal land. Always check this database before panning on BLM or National Forest land.
M
Magnetite: A magnetic iron oxide mineral (Fe3O4) that forms black sand. Magnetite is heavy and concentrates with gold in stream deposits. Use a magnet to remove magnetite from your gold concentrate.
Mining claim: A legal right to the minerals on a specific parcel of federal land, established under the General Mining Law of 1872. Lode claims cover vein deposits. Placer claims cover alluvial deposits. Active claims give the holder exclusive mineral rights. Panning on someone else’s claim without permission is illegal trespass.
Mother Lode: Originally a specific 120-mile belt of gold-bearing quartz veins in California’s Sierra Nevada foothills. The term is now used loosely to describe any exceptionally rich gold deposit or the main vein feeding smaller deposits in an area.
N
Nugget: A substantial piece of gold, generally larger than a picker (over about 5mm). Nuggets are rare finds for recreational panners. Alaska, Arizona, Nevada, and some California and Oregon locations are known for producing nuggets. Nuggets are worth a premium over the spot price of gold due to their collectibility.
Nugget shooting: Using a metal detector specifically designed for gold to find gold nuggets in the ground. Particularly popular in Arizona, Nevada, and Western Australia.
O
Ore: Rock containing gold (or other metals) in sufficient concentration to be mined profitably. Commercial gold ore may contain as little as 1-2 grams of gold per tonne. The gold in most commercial ore is invisible to the naked eye.
Overburden: The material (soil, gravel, rock) that sits on top of a gold-bearing layer. Removing overburden to reach the pay layer is a significant part of the work in both commercial and recreational mining.
P
Pan (verb): To wash material in a gold pan, using a swirling motion to separate heavy gold from lighter sand and gravel. The fundamental technique of recreational gold prospecting. See our gold panning techniques guide.
Pay dirt: Material that contains enough gold to be worth processing. In recreational panning, any material that produces visible gold qualifies as pay dirt. Commercial pay dirt is also sold online as pre-loaded bags of gold-bearing material for practice panning at home.
Pay streak: A concentrated line or zone of gold within a placer deposit, usually following the path of heaviest water flow along bedrock. Finding a pay streak means finding the richest part of a deposit.
Picker: A piece of gold large enough to pick up with your fingers or tweezers, typically 2-5mm. Larger than a flake, smaller than a nugget. A very satisfying find for recreational panners.
Placer (PLASS-er): A deposit of sand, gravel, or other sediment containing particles of gold or other valuable minerals. Placer mining is the extraction of gold from these deposits. The word comes from Spanish, meaning a sandbank or alluvial deposit. Almost all recreational gold panning targets placer deposits.
Plan of Operations: A detailed plan required by the BLM or US Forest Service for mining activities that go beyond casual use and cause significant surface disturbance. Not required for hand panning.
Prospect (verb): To search for gold or other valuable minerals. A prospector is someone who prospects.
Q
Quartz: A hard, glassy mineral (SiO2) commonly associated with gold deposits. Gold-bearing quartz veins are the primary lode source of placer gold in most US gold districts. White quartz float or outcrops in a stream are a positive indicator of gold-bearing geology. Not all quartz contains gold, but finding quartz is a reason to sample the area.
R
Riffles: Raised ridges or grooves in a sluice box or gold pan that trap heavy materials (including gold) while allowing lighter material to wash over them. The riffle design is the key to a sluice box’s effectiveness.
Rocker box (cradle): A hand-operated device for washing gold-bearing material. Material is placed in a hopper on top, water is poured over it, and the rocking motion washes material through a screen and over riffles. Faster than panning but slower than a sluice box. Used by 49ers during the California Gold Rush.
S
Sampling: Testing a location by panning small amounts of material from different spots to determine whether gold is present and where it concentrates. Good prospectors sample methodically before committing to dig in one spot.
Sluice box: A long, narrow trough with riffles on the bottom, placed in flowing water. Material is fed into the upstream end, water washes it through, and the riffles trap gold and other heavy minerals. Faster than panning and recovers more gold. Non-motorized sluice boxes are generally casual use on BLM land. See our how to use a sluice box guide.
Snuffer bottle: A small squeeze bottle used to suck up fine gold particles from a pan or crevice. One of the most useful tools for fine gold recovery. Works by squeezing the bottle, placing the tip near a gold flake, and releasing to create suction.
Specific gravity: The density of a material relative to water. Gold has a specific gravity of 19.3, meaning it is 19.3 times heavier than water. This extreme density is why gold sinks to the bottom of a pan or sluice while lighter material washes away. For comparison, quartz is 2.65 and magnetite is 5.2.
Spot price: The current market price for one troy ounce of gold. Fluctuates constantly based on supply, demand, and economic conditions. As of early 2025, gold spot prices exceeded $2,800 per troy ounce.
Stamp mill: A historical machine that crushed gold-bearing ore into fine powder for processing. Stamp mills were powered by water or steam and were the primary ore processing method from the 1850s through early 1900s. Ruins of stamp mills can be found at many historic mine sites.
Stratification: The natural layering of materials by weight in a gold pan or stream deposit. When you agitate material in water, heavy particles (gold, black sand) sink to the bottom and light particles (sand, clay) rise to the top. Panning technique works by exploiting stratification.
Suction dredge: See “Dredge.”
T
Tailings: The material discarded after gold has been extracted. Tailings piles from historic mining operations can sometimes still contain gold that early miners missed or could not recover with their technology.
Troy ounce: The standard unit of measurement for gold. One troy ounce equals 31.1 grams (slightly heavier than a standard avoirdupois ounce of 28.35 grams). Gold prices are quoted per troy ounce.
V
Vein: A sheet-like body of mineral (typically quartz) filling a fracture in rock. Gold-bearing quartz veins are the primary lode source of placer gold. Veins can range from a fraction of an inch to several feet wide.
Virgin ground: Land that has never been prospected or mined. Increasingly rare in well-known gold districts but can still be found in remote areas.
W
Wash plant: A large-scale mechanical system for processing gold-bearing gravel. Used in commercial placer mining operations. Not relevant to recreational panners.
Withdrawn land: Federal land that has been removed from mineral entry by law or executive order. Withdrawn land is off-limits to prospecting. Wilderness Areas, National Parks, and many National Monuments are examples of withdrawn land.
Quick Reference: Gold Mining Terms by Category
Gold types: Alluvial gold, byproduct gold, eluvial deposit, fine gold, flake, flour gold, glacial gold, lode, nugget, placer, picker.
Equipment: Classifier, crevicing tool, dredge (suction dredge), dry washer, gold pan, highbanker, rocker box, sluice box, snuffer bottle.
Geology: Bedrock, bench deposit, black sand, false bedrock, float, gold belt, greenstone belt, magnetite, Mother Lode, ore, overburden, quartz, specific gravity, vein.
Techniques: Amalgamation, crevicing, dry washing, nugget shooting, panning, sampling, stratification.
Legal/Regulatory: BLM, casual use, claim (mining claim), HPA, LR2000, Plan of Operations, withdrawn land.
Prospecting slang: Color, pay dirt, pay streak, virgin ground, boom town, ghost town, grubstake.
Resources
- Pan for Treasure – Getting Started with Gold Panning – Complete beginner’s guide to recreational gold panning.
- Pan for Treasure – Gold Panning Techniques – How to pan, read a stream, and find gold.
- Pan for Treasure – Gold Panning Laws by State – Regulations for all 50 states.
- Bureau of Land Management – Federal land access, LR2000 claims database, and casual use rules.
- Gold Prospectors Association of America (GPAA) – Claims, chapters, and prospecting education.
Conclusion
This gold mining terms glossary covers the vocabulary you need to understand prospecting regulations, communicate with other panners, and make sense of the geology and techniques behind finding gold. Bookmark this page and refer back to it as you learn. For more on getting into the hobby, see our getting started guide, our best gold panning kits, and our gold panning near me page to find spots close to you. Check our gold panning laws by state directory before heading out, and visit our best places to pan and gold rush hotspots guides for location ideas.
Frequently Asked Questions
What does “getting color” mean in gold panning?
“Getting color” means finding visible gold in your pan. Even a single tiny flake counts. The term is universal among prospectors. “Good color” means a meaningful amount of gold. “No color” means no gold was found in that sample.
What is the difference between placer gold and lode gold?
Placer gold is found in stream gravels and sediments, having been eroded from its original source and transported by water. Lode gold is embedded in solid rock (typically quartz veins) and requires hardrock mining to extract. Placer gold comes from the erosion of lode deposits over millions of years. Recreational panners target placer gold.
What does “casual use” mean for gold panning?
Casual use is a BLM and US Forest Service regulatory term for prospecting activities that cause no or negligible disturbance. Hand panning, hand shoveling, and non-motorized sluice boxes qualify. Casual use does not require a permit. Motorized equipment exceeds casual use and requires authorization.
What is black sand and does it mean gold is nearby?
Black sand is primarily magnetite (iron oxide), a heavy mineral that concentrates in the same areas as gold. Finding black sand is a positive indicator that you are in a spot where heavy minerals concentrate, which is where gold would settle if present. However, black sand does not guarantee gold. Many streams have abundant black sand but no gold.
How heavy is gold compared to other materials?
Gold has a specific gravity of 19.3, meaning it is 19.3 times heavier than water. For comparison, lead is 11.3, iron is 7.9, quartz is 2.65, and most sand is 2.5-2.7. Gold’s extreme density is why panning works: gold sinks to the bottom while everything else washes away.
What is a mining claim and do I need one to pan?
A mining claim is a legal right to the minerals on a specific parcel of federal land under the General Mining Law of 1872. You do not need a claim to pan on unclaimed public land as casual use. However, you must not pan on someone else’s active claim without their permission. Check the BLM LR2000 database before panning.
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Ryan Conlon is the founder of Pan for Treasure.
A lifelong gold panning enthusiast, he created this site to help beginners learn the ropes and share practical tips from his own time on the creek. [email protected]