Steinhardtite is a rare naturally occurring metallic aluminum phase found primarily within the Khatyrka meteorite. It is typically discovered as microscopic grains associated with other rare aluminum-copper alloys in carbonaceous chondrites, requiring sophisticated analysis for identification.
Is this steinhardtite?
3-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 steinhardtite with a known reference. Steinhardtite sits at Mohs 3.5, softer than the next harder reference, harder than the previous one.
- 2Read the lusterHold the specimen under a strong light. Luster: metallic.
- 3Look at form & habitCrystal system: cubic. Typical habit: granular, microscopic inclusions.
Often found alongside steinhardtite
Minerals reported to co-occur with steinhardtite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Al
- Mohs hardness
- 3.5
- Density
- 5.52 g/cm³
- Luster
- Metallic
- Transparency
- Opaque
- Crystal system
- Cubic
- Crystal habit
- Granular, microscopic inclusions
- Rarity
- Rare
- Uses
- Collector, Research
- Host rock
- In a carbonaceous chondrite meteorite, likely formed by shock metamorphism
Where rockhounds find steinhardtite
Classic worldwide localities
- Khatyrka meteorite, Koryak Mountains, Russia
Field-hunting tip
Where it forms: In a carbonaceous chondrite meteorite, likely formed by shock metamorphism. If you start seeing trevorite, ahrensite, coesite in float, you are in the right ground. Typical habit: granular, microscopic inclusions. Train your eye for that shape before scanning the outcrop.
Common questions
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Find steinhardtite on the map
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