Achroite and Peridot Physical Properties

Achroite

Peridot

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.401.54-1.55

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

Not Available

Poor

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

(Mg,Fe)₂SiO₄

Achroite and Peridot Chemical Formula

While comparing Achroite and Peridot 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 Achroite and Peridot chemical formula.

Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Peridot- (Mg,Fe)₂SiO₄

Compare Gems Found in South Asia

Achroite Vs Aquamarine

Achroite Vs Apatite

Achroite Vs Apophyllite

Achroite and Peridot Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Peridot Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Peridot Optical Properties during the identification of gemstone. Specific gravity of Achroite is 1.54-1.55 whereas that of Peridot is 1.54-1.55.