Photo: Fred Kruijen · CC BY-SA 3.0 nl

Silica mineral, polymorph of quartz

Properties

Chemical formula

SiO₂

Group

Silicates

Crystal system

Orthorhombic

Hardness (Mohs)

—

Color

Colorless

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

C222₁

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.DA.10

Dana classification

75.1.2.1

IMA status

Grandfathered mineral (G)

IMA symbol

Trd

Locality

🇲🇽 Mount San Cristóbal

Type locality

—

Discovery year

—

Source: Wikidata