Proto-ferro-anthophyllite

A variety of Minerals

What is Proto-ferro-anthophyllite?

Pricing varies for every rock and mineral, so use these universal factors to gauge Proto-ferro-anthophyllite 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.

Applies to all rocks & minerals.

See where Proto-ferro-anthophyllite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview

North ZoneCentral RidgeSouth Basin

Chemical Formula: ☐{Fe²⁺2}{Fe²⁺5}(Si₈O₂₂)(OH)₂ The anthophyllite group are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup. The minerals in this root name group may have either Pnma or Pnmn (proto- prefixed name) space group symmetry. The anthophyllite group's composition is defined with A(Na+K+2Ca)<0.5 apfu and C(Al+Fe³⁺+2Ti)<1 apfu. Proto-ferro-anthophyllite has a Pnmn space group symmetry and is defined with Fe²⁺ as the dominant element both in the B and C positions.
Elements: Fe, H, O, Si