Gedrite and Polyhalite Physical Properties

Gedrite

Polyhalite

Add ⊕

Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.15-3.2592.78

1 7.18

👆🏻

Fracture

Conchoidal

Cleavage

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

Perfect on {10 1 }; parting on {010}

Mohs Hardness

5.5-63.5

2 10

👆🏻

Chemical Composition

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

K2Ca2Mg(SO4)4·2H2O

Gedrite and Polyhalite Chemical Formula

While comparing Gedrite and Polyhalite 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 Gedrite and Polyhalite chemical formula.

Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Compare Brown Gemstones

Gedrite Vs Magnetite

Gedrite Vs Manganaxinite

Gedrite Vs Mellite

Gedrite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gedrite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 2.78 whereas that of Polyhalite is 2.78.