Proto-anthophyllite

A variety of Minerals

What is Proto-anthophyllite?

Market Value Factors

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

Quick Facts

Physical Properties

Color: colourless to white
Hardness (Mohs): 6
Rock tumbling: With care
Density: 2.98 g/cm³
Streak: white

Chemical Properties

Chemical Formula: ☐{Mg₂}{Mg₅}(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-anthophyllite is defined with Pnmm symmetry and Mg as the dominant element both in the B and C positions.
Elements: H, Mg, O, Si

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Proto-anthophyllite FAQs

How do I identify Proto-anthophyllite?

Proto-anthophyllite can be identified by its hardness of 6 on the Mohs scale, colourless to white color. Look for these key characteristics when examining specimens.

What color is Proto-anthophyllite?

Proto-anthophyllite typically appears in colourless to white. Color can vary depending on impurities and formation conditions.

How hard is Proto-anthophyllite?

Proto-anthophyllite has a hardness of 6 on the Mohs scale. This gives it moderate hardness.