Fluorite and Obsidian Physical Properties

Fluorite

Obsidian

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

3.00-3.252.35-2.60

1 7.18

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Fracture

Subconchoidal, Uneven, ConchoidalWalter Schumann

Conchoidal, ConchoidalWalter Schumann

Cleavage

Octahedral, perfect on {111}, parting on {011}

None

Mohs Hardness

45-5.5

2 10

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Chemical Composition

CaF₂

SiO2

Fluorite and Obsidian Chemical Formula

While comparing Fluorite and Obsidian physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Fluorite and Obsidian chemical formula.

Chemical formula of Fluorite- CaF₂
Chemical formula of Obsidian- SiO2

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Fluorite and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fluorite and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fluorite and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Fluorite is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.