Purpurite is an attractive manganese phosphate mineral, recognized for its vibrant deep purple to violet coloration resulting from iron-to-manganese oxidation. It is most often found as massive or encrusted material within pegmatites, where it forms through the alteration of lithiophilite. Collectors prize it for its intense color, though its softness makes it challenging for jewelry use without stabilization.
Is this purpurite?
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 purpurite with a known reference. Purpurite sits at Mohs 4-4.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Purpurite leaves a purple streak.
- 3Read the lusterHold the specimen under a strong light. Purpurite typically shows a dull luster.
- 4Match the color rangeCompare against the expected color range: deep purple, violet, brown, black.
- 5Look at form & habitCrystal system: orthorhombic. Typical habit: massive, granular, or encrustations.
Often confused with
Purpurite vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Purpurite is noticeably harder (Mohs 4-4.5 vs. 2.5-3); streak differs — Purpurite leaves purple, Lepidolite leaves white; luster reads dull on Purpurite and pearly on Lepidolite.
How to tell apart: Sugilite is the harder of the two (Mohs 6-6.5 vs. 4-4.5); streak differs — Purpurite leaves purple, Sugilite leaves white; luster reads dull on Purpurite and vitreous on Sugilite.
How to tell apart: Streak differs — Purpurite leaves purple, Charoite leaves white; luster reads dull on Purpurite and pearly on Charoite.
Often found alongside purpurite
Minerals reported to co-occur with purpurite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Mn³⁺PO₄
- Mohs hardness
- 4-4.5
- Density
- 3.3-3.4 g/cm³
- Streak
- Purple
- Luster
- Dull
- Transparency
- Opaque
- Crystal system
- Orthorhombic
- Crystal habit
- Massive, Granular, Or Encrustations
- Cleavage
- Distinct in One Direction
- Rarity
- Uncommon
- Uses
- Collector, Lapidary
- Host rock
- Granite Pegmatites
- Typical price
- $10-100 per specimen
Where rockhounds find purpurite
1 mapped spotsClassic worldwide localities
- Namibia
- USA (North Carolina)
- France
- Australia
- Portugal
Field-hunting tip
Look in granite pegmatites country — that is the host setting where purpurite typically forms. If you start seeing triphylite, lithiophilite, quartz in float, you are in the right ground. Field specimens usually show a massive, granular, or encrustations habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in North Carolina — start trip planning there.
Common questions
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Find purpurite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
