Chrome-Chalcedony and Astrophyllite Physical Properties

Chrome-Chalcedony

Astrophyllite

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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

2.55-2.70

3.2-3.4

1.5 Fracture

Not Available

Uneven, Brittle, Metallic

1.6 Cleavage

Not Available

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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

Chrome-Chalcedony and Astrophyllite Chemical Formula

While comparing Chrome-Chalcedony and Astrophyllite 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 Chrome-Chalcedony and Astrophyllite chemical formula.

Chemical formula of Chrome-Chalcedony- SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Chrome-Chalcedony and Astrophyllite Specific Gravity

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