Photo: Wikimedia Commons

Sapphirine supergroup, single chain inosilicate mineral

Properties

Chemical formula

Ca₄(Mg₃Fe³⁺₉)O₄(Si₃Al₈Fe³⁺O₃₆)

Group

Silicates

Crystal system

—

Hardness (Mohs)

—

Color

Brown

Luster

—

Streak

Grey

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.DH.45

Dana classification

—

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Dor

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata