Zoisite and Gedrite Physical Properties

Zoisite

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.20-3.503.15-3.259

1 7.18

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Fracture

Uneven, Conchoidal, Even

Cleavage

Perfect {010} imperfect {100}

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

Mohs Hardness

6-75.5-6

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Zoisite and Gedrite Chemical Formula

While comparing Zoisite and Gedrite 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 Zoisite and Gedrite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Zoisite and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.