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.

Hardness
8-9
Mohs
Luster
Vitreous
Streak
White
Transparency
Translucent

Is this magnesionigerite-2n1s?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

  • 1
    Test the hardness
    Try 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.
  • 2
    Check the streak
    Drag the specimen across an unglazed porcelain plate. Magnesionigerite-2N1S leaves a white streak.
  • 3
    Read the luster
    Hold the specimen under a strong light. Magnesionigerite-2N1S typically shows a vitreous luster.
  • 4
    Match the color range
    Compare against the expected color range: brown, reddish-brown, black.
  • 5
    Look at form & habit
    Crystal 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
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.

Common questions

How do you identify magnesionigerite-2n1s?+
Mohs hardness is 8-9. It typically shows a vitreous luster. The streak is white. Common colors include brown, reddish-brown, black.
Where is magnesionigerite-2n1s found?+
Notable localities include Kabba-Bunu, Nigeria; Finland; Sweden; Russia.
How much is magnesionigerite-2n1s worth?+
Typical asking prices fall in the range of $50-300 per specimen. Quality, size, and provenance can move individual specimens well outside that range.
What rocks look like magnesionigerite-2n1s?+
Magnesionigerite-2N1S is most often confused with Gahnite, Corundum. A quick hardness test and a streak check separate the look-alikes faster than color alone.
What minerals are found with magnesionigerite-2n1s?+
Magnesionigerite-2N1S commonly co-occurs with Sillimanite, Quartz, Gahnite, Muscovite. Spotting any of these in float or country rock is a useful trip signal.
What kind of rock does magnesionigerite-2n1s form in?+
Magnesionigerite-2N1S typically forms in granite pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.
What is magnesionigerite-2n1s used for?+
Magnesionigerite-2N1S is used in collector.

Find magnesionigerite-2n1s on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.

Download on the App StoreGet it on Google Play