Astrophyllite and Scapolite Physical Properties

Astrophyllite

Scapolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.42.58-2.74

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Splintery

1.6 Cleavage

Perfect on [001] imperfect on [100]

{100} Distinct, {110} Distinct

1.7 Mohs Hardness

35.5-6

2 10

1.8 Chemical Composition

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

Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Astrophyllite and Scapolite Chemical Formula

While comparing Astrophyllite and Scapolite 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 Scapolite 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 Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Green Gemstones

Astrophyllite Vs Blue John

Astrophyllite Vs Bloodstone Heliotrope

Astrophyllite Vs Black Opal

Astrophyllite and Scapolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Scapolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Scapolite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.58-2.74 whereas that of Scapolite is 2.58-2.74.