Photo: J. Smyth. / Jasperox at en.wikipedia · CC BY-SA 1.0

Silica mineral, rare polymorph of quartz

Properties

Chemical formula

SiO₂

Group

Silicates

Crystal system

Monoclinic

Hardness (Mohs)

—

Color

Colorless

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

C2/c

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.DA.35

Dana classification

75.1.4.1

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Coe

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata