Andalusite and Lazurite Physical Properties

Andalusite

Lazurite

Add ⊕

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.05-3.21

Uneven, Subconchoidal, Splintery

Good on {110}, poor on {100}

7.5

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

Brittle

Soluble

2.75

Uneven, Conchoidal

Imperfect on {110}

5.5

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Andalusite and Lazurite Chemical Formula

While comparing Andalusite and Lazurite 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 Lazurite chemical formula.

Compare Brown Gemstones

Andalusite Vs Apatite

Andalusite Vs Apophyllite

Andalusite Vs Aragonite

Andalusite and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite Vs Lazurite during the identification of gemstone. Specific gravity of Andalusite is whereas that of Lazurite is .