Fluorite with Calcite and Barite inclusion

Fluorite – CaF₂

Elements: Calcium, Fluorine

Class: Halides

Crystal System: Cubic

Hardness: 4

Fluorite

Talc (1)Diamond (10)

Softer than glass. A steel knife scratches it.

Calcite – Ca(CO₃)

Elements: Calcium, Carbon, Oxygen

Class: Carbonates

Crystal System: Hexagonal

Hardness: 3

Calcite

Talc (1)Diamond (10)

A copper coin can scratch it.

Barite – BaSO₄

Elements: Barium, Sulfur, Oxygen

Class: Sulfates – Sulfates

Crystal System: Orthorhombic

Hardness: 3-3.5

Calcite

Talc (1)Diamond (10)

A copper coin can scratch it.

Origin: Rosiclare Level, Minerva#1 Mine, Illinois – Usa

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