Andalusite and Fluorite Physical Properties

Andalusite

Fluorite

Add ⊕

Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

3.05-3.213.00-3.25

1 7.18

👆🏻

Fracture

Uneven, Subconchoidal, Splintery

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

Good on {110}, poor on {100}

Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

7.54

2 10

👆🏻

Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

CaF₂

Andalusite and Fluorite Chemical Formula

While comparing Andalusite and Fluorite 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 Andalusite and Fluorite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Fluorite- CaF₂

Compare Brown Gemstones

Andalusite Vs Apatite

Andalusite Vs Apophyllite

Andalusite Vs Aragonite

Andalusite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.