Magnesionigerite-2N1S is a rare tin-bearing oxide mineral belonging to the nigerite group. It typically occurs as small, tabular, hexagonal crystals in metamorphic or pegmatitic environments and is highly valued by micro-mount collectors for its rarity and complex crystallography.
Is this magnesionigerite-2n1s?
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 magnesionigerite-2n1s with a known reference. Magnesionigerite-2N1S sits at Mohs 8-9 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Magnesionigerite-2N1S leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Magnesionigerite-2N1S typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: brown, reddish-brown, black.
- 5Look at form & habitCrystal system: hexagonal. Typical habit: tabular crystals, platy.
Often confused with
Magnesionigerite-2N1S vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside magnesionigerite-2n1s
Minerals reported to co-occur with magnesionigerite-2n1s. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (Mg,Fe²⁺,Zn)(Sn,Ti)₂Al₆O₁₂
- Mohs hardness
- 8-9
- Density
- 4.5-4.6 g/cm³
- Colors
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Hexagonal
- Crystal habit
- Tabular Crystals, Platy
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Granite Pegmatites
- Typical price
- $50-300 per specimen
Where rockhounds find magnesionigerite-2n1s
Classic worldwide localities
- Kabba-Bunu, Nigeria
- Finland
- Sweden
- Russia
Field-hunting tip
Look in granite pegmatites country — that is the host setting where magnesionigerite-2n1s typically forms. If you start seeing sillimanite, quartz, gahnite in float, you are in the right ground. Field specimens usually show a tabular crystals, platy habit, so train your eye for that shape before scanning the outcrop.





