M MineralystRock & Mineral Guide
Gemstone

Moss Agate

Moss Agate — reference photo

Moss Agate is a gemstone with the chemical formula SiO2. It has a Mohs hardness of 6.5 - 7 and vitreous to waxy luster.

Moss Agate properties

TypeGemstone
Chemical formulaSiO2
Mohs hardness6.5 - 7
LusterVitreous to waxy
Typical colorsTranslucent to opaque, commonly green with dendritic inclusions, but can also appear in shades of brown, red, and blue.
FormationFormed from the solidification of silica in a botryoidal form, often found in volcanic rocks or as nodules in sedimentary deposits.
Rarity5 / 10

Mohs hardness 6.5–7 — hard

1 · Talc5 · Apatite10 · Diamond
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