Afghanite and Amethyst Physical Properties

Afghanite

Amethyst

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble in common solvents

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.652.65

1 7.18

1.8 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.9 Cleavage

Perfect {10 1 0}

Indiscernible

1.10 Mohs Hardness

5.5-67

2 10

1.12 Chemical Composition

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

SiO₂

Afghanite and Amethyst Chemical Formula

While comparing Afghanite and Amethyst 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 Afghanite and Amethyst chemical formula.

Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Amethyst- SiO₂

Compare Blue Gemstones

Afghanite Vs Glaucophane

Afghanite Vs Kainite

Afghanite Vs Hauyne

Afghanite and Amethyst Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.65 whereas that of Amethyst is 2.65.