Ferri-winchite
A variety of Winchite Root Name Group
What is Ferri-winchite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferri-winchite 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.
Ferri-winchite Localities Map
See where Ferri-winchite 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)
- 5.5
- Density
- 3.14 g/cm³
Chemical Properties
- Chemical Formula
- ☐[CaNa][Mg<sub>4</sub>(Fe<sup>3+</sup>,Al)]Si8O22(OH)2 The winchite-group minerals are defined as sodium-calcium amphiboles with A(Na+K+ 2Ca)<0.5 apfu and with C(Al+Fe3++2Ti)<1.5 apfu. The W position may contain (OH), F or Cl. Ferri-winchite is defined with C2+ position: Mg dominant C3+ position: Fe dominant W position: (OH) dominant.
- Elements
- Al, Ca, Fe, H, Mg, Na, O, Si
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Ferri-winchite FAQs
How do I identify Ferri-winchite?
Ferri-winchite can be identified by its hardness of 5.5 on the Mohs scale, black color. Look for these key characteristics when examining specimens.
What color is Ferri-winchite?
Ferri-winchite typically appears in black. Color can vary depending on impurities and formation conditions.
How hard is Ferri-winchite?
Ferri-winchite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.