Ferro-ferri-hornblende
A variety of Hornblende Root Name Group
What is Ferro-ferri-hornblende?
Ferro-ferri-hornblende is an amphibole-supergroup mineral with the formula ☐Ca2(Fe4Fe)(Si7Al)O22(OH)2. It contains essential vacancy (☐). It was discovered in the Traversella mine, Canavese, Torino, Piedmont, Italy.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferro-ferri-hornblende 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.
Ferro-ferri-hornblende Localities Map
See where Ferro-ferri-hornblende is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark greenish
- Density
- 3.35 g/cm³
Chemical Properties
- Chemical Formula
- ☐Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2 Defined as a an amphibole in the magnesiohornblende group of the Calcium subgroup with Fe2+Mg and Fe3+Al in the C position and with (OH) as the dominant anion in the W position
- Elements
- Al, Ca, Fe, H, O, Si
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Ferro-ferri-hornblende FAQs
How do I identify Ferro-ferri-hornblende?
Ferro-ferri-hornblende can be identified by its Dark greenish color. Look for these key characteristics when examining specimens.
What color is Ferro-ferri-hornblende?
Ferro-ferri-hornblende typically appears in Dark greenish. Color can vary depending on impurities and formation conditions.
