Mitrofanovite is an extremely rare platinum telluride-stannide known primarily from the Konder Massif in Russia. It typically occurs as microscopic inclusions within platinum-group element alloys and is highly prized by advanced mineral species collectors.
Is this mitrofanovite?
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 mitrofanovite with a known reference. Mitrofanovite sits at Mohs 3.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Mitrofanovite leaves a gray streak.
- 3Read the lusterHold the specimen under a strong light. Mitrofanovite typically shows a metallic luster.
- 4Match the color rangeCompare against the expected color range: white.
- 5Look at form & habitCrystal system: trigonal. Typical habit: irregular grains and inclusions.
Often confused with
Mitrofanovite vs. its common look-alikes, and how to tell them apart in the field.

How to tell apart: Sperrylite is the harder of the two (Mohs 6-7 vs. 3.5); streak differs, so Mitrofanovite leaves gray, Sperrylite leaves black.

How to tell apart: Streak differs, so Mitrofanovite leaves gray, Cooperite leaves black.
Often found alongside mitrofanovite
Minerals reported to co-occur with mitrofanovite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Pt₂Te₃Sn
- Mohs hardness
- 3.5
- Density
- 11.18 g/cm³
- Colors
- Streak
- Gray
- Luster
- Metallic
- Transparency
- Opaque
- Crystal system
- Trigonal
- Crystal habit
- Irregular Grains and Inclusions
- Cleavage
- Good On {00*1}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Alkaline-ultramafic Igneous Rocks
Where rockhounds find mitrofanovite
Classic worldwide localities
- Konder Massif, Khabarovsk Krai, Russia
Field-hunting tip
Look in alkaline-ultramafic igneous rocks country, the host setting where mitrofanovite typically forms. If you start seeing platinum, bornite, chalcopyrite in float, you are in the right ground. Field specimens usually show a irregular grains and inclusions habit, so train your eye for that shape before scanning the outcrop.




