Astrophyllite and Zoisite Physical Properties

Astrophyllite

Zoisite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.20-3.50

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even

1.6 Cleavage

Perfect on [001] imperfect on [100]

Perfect {010} imperfect {100}

1.7 Mohs Hardness

36-7

2 10

1.8 Chemical Composition

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Ca₂Al₃(SiO₄)₃(OH)

Astrophyllite and Zoisite Chemical Formula

While comparing Astrophyllite and Zoisite 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 Astrophyllite and Zoisite chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)

Compare Green Gemstones

Astrophyllite Vs Bloodstone Heliotrope

Astrophyllite Vs Black Opal

Astrophyllite Vs Blue John

Astrophyllite and Zoisite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Zoisite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Zoisite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.20-3.50 whereas that of Zoisite is 3.20-3.50.