Schreyerite
A variety of Minerals
What is Schreyerite?
Schreyerite (V2Ti3O9), is a vanadium, titanium oxide mineral found in the Lasamba Hill, Kwale district in Coast Province, Kenya. It is polymorphous with kyzylkumite. The mineral occurs as exsolution lamellae and particles in rutile, coexisting with kyanite, sillimanite, and tourmaline in a highly metamorphosed gneiss. It was named after German mineralogist and petrologist Werner Schreyer, for his research on mineralogy of rock-forming minerals and petrology of metamorphic rocks both in nature and by experiment.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Schreyerite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Schreyerite Localities Map
See where Schreyerite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black
- Hardness (Mohs)
- 7
Chemical Properties
- Chemical Formula
- V3+2Ti3O9
- Elements
- O, Ti, V
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Schreyerite FAQs
How do I identify Schreyerite?
Schreyerite can be identified by its hardness of 7 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Schreyerite?
Schreyerite typically appears in Black. Color can vary depending on impurities and formation conditions.
How hard is Schreyerite?
Schreyerite has a hardness of 7 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.
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