Andradite and Precious Opal Physical Properties

Andradite

Precious Opal

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.101.98-2.25

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

1.6 Cleavage

none

Not Available

1.7 Mohs Hardness

6.5-75-6.5

2 10

1.8 Chemical Composition

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

SiO 2 · nH 2OGemdat.org , Management Team (2012)

Andradite and Precious Opal Chemical Formula

While comparing Andradite and Precious Opal 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 Andradite and Precious Opal chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)

Compare Green Gemstones

Andradite Vs Aragonite

Andradite Vs Augite

Andradite Vs Astrophyllite

Andradite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Andradite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.