Almandine and Feldspar Physical Properties

Almandine

Feldspar

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

2.56-2.75

1.5 Fracture

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

Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

none

two or three

1.7 Mohs Hardness

7-7.5

6-6.5

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Not Available

Almandine and Feldspar Chemical Formula

While comparing Almandine and Feldspar 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 Almandine and Feldspar chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Red Gemstones

Almandine Vs Baryte Barite

Almandine Vs Aragonite

Almandine Vs Black Opal

Almandine and Feldspar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Almandine is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.