Quartz

Real mineral · common · SiO₂

One of the most abundant minerals in Earth's crust. Forms in a wide range of geological environments, from igneous pegmatites to hydrothermal veins. Its piezoelectric properties make it vibrate at precise frequencies under electrical current.

Identity

Formula

SiO₂

Chemical class

silicate

Mineral group

Amethyst, Bloodstone, Carnelian, Chalcedony, Citrine, Rose Quartz, Smoky Quartz, Tiger's Eye

Also known as

Rock crystal, Silica, Macrocrystalline quartz

Crystallography

Crystal system

trigonal

Habits

prismatic, massive, drusy

Fracture

conchoidal

Physical properties

Mohs hardness

7

Density

2.65 g/cm³

Luster

vitreous

Colors

colorless, white, purple, pink, yellow, brown, black

Streak

white

Transparency

transparent, translucent, opaque

Geology

Origins

hydrothermal, metamorphic, sedimentary, igneous

Host rocks

granite, schist, sandstone

Associated minerals

feldspar, Mica, Tourmaline

Geography

worldwide

Classification

Rarity

common

Gem quality

Yes

Arcane properties

Affinity

arcane, light

Effects

scrying, warding

Planar origin

Material Plane

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