Native bismuth is highly sought after by collectors for its iconic iridescent, staircase-like 'hopper' crystal structures, which form when it cools rapidly. It is remarkably heavy for its size due to its high density and is easily recognized by its bright, multi-colored surface oxidation. It is most commonly found in hydrothermal veins associated with cobalt and silver deposits.
Is this native bismuth?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch native bismuth with a known reference. Native Bismuth sits at Mohs 2-2.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Native Bismuth leaves a silver-white streak.
- 3Read the lusterHold the specimen under a strong light. Native Bismuth typically shows a metallic luster.
- 4Match the color rangeCompare against the expected color range: silver-white, pinkish-white, iridescent.
- 5Look at form & habitCrystal system: trigonal. Typical habit: rhombohedral crystals, skeletal hopper crystals, granular, massive.
Often confused with
Native Bismuth vs. its common look-alikes, and how to tell them apart in the field.
How to tell apart: Streak differs, so Native Bismuth leaves silver-white, Antimony leaves tin-white.
How to tell apart: Streak differs, so Native Bismuth leaves silver-white, Galena leaves lead-gray.
How to tell apart: Arsenic is the harder of the two (Mohs 3.5 vs. 2-2.5); streak differs, so Native Bismuth leaves silver-white, Arsenic leaves black.
Often found alongside native bismuth
Minerals reported to co-occur with native bismuth. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Bi
- Mohs hardness
- 2-2.5
- Density
- 9.7-9.8 g/cm³
- Streak
- Silver-white
- Luster
- Metallic
- Transparency
- Opaque
- Crystal system
- Trigonal
- Crystal habit
- Rhombohedral Crystals, Skeletal Hopper Crystals, Granular, Massive
- Cleavage
- Perfect Basal
- Rarity
- Uncommon
- Uses
- Collector, Industrial, Decorative
- Host rock
- Hydrothermal Veins, Granite Pegmatites
- Typical price
- $10-50 per specimen depending on hopper crystal quality
Where rockhounds find native bismuth
Classic worldwide localities
- Schneeberg, Germany
- Bolivia
- Cobalt, Ontario, Canada
- Guanajuato, Mexico
- China
Field-hunting tip
Look in hydrothermal veins, granite pegmatites country, the host setting where native bismuth typically forms. If you start seeing cobaltite, skutterudite, silver in float, you are in the right ground. Field specimens usually show a rhombohedral crystals, skeletal hopper crystals, granular, massive habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find native bismuth on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
