M MineralystRock & Mineral Guide
Fossil

Ammonite Fossil

Ammonite Fossil — reference photo

Ammonite Fossil is a fossil. It has a Mohs hardness of 3-4 (Mohs scale) and variable, often pearly or glassy luster.

Ammonite Fossil properties

TypeFossil
Mohs hardness3-4 (Mohs scale)
LusterVariable, often pearly or glassy
Typical colorsBrown, gray, black, red, and sometimes iridescent
FormationFormed from the remains of ancient marine mollusks; found in sedimentary rock
Rarity6 / 10

Mohs hardness 3–4 — soft

1 · Talc5 · Apatite10 · Diamond
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