M MineralystRock & Mineral Guide
Rock

Dacite

Dacite — reference photo

Dacite is a rock with the chemical formula SiO2 ~ 63-68%. It has a Mohs hardness of 6 - 7 and glassy to dull luster.

Dacite properties

TypeRock
Chemical formulaSiO2 ~ 63-68%
Mohs hardness6 - 7
LusterGlassy to dull
Typical colorsGray, green, or brown
FormationVolcanic, formed from the cooling of lava
Rarity5 / 10

Mohs hardness 6–7 — hard

1 · Talc5 · Apatite10 · Diamond
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