Astrophyllite and Purpurite Physical Properties

Astrophyllite

Purpurite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.2-3.4

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Perfect on [001] imperfect on [100]

[100] [001] perfect

1.7 Mohs Hardness

34-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Astrophyllite and Purpurite Chemical Formula

While comparing Astrophyllite and Purpurite 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 Purpurite 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 Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Compare Green Gemstones

Astrophyllite Vs Black Opal

Astrophyllite Vs Blue John

Astrophyllite Vs Bloodstone Heliotrope

Astrophyllite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.