Annabergite and Boulder Opal Physical Properties

Annabergite

Boulder Opal

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.07

1.98-2.25

1.5 Fracture

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {010}, indistinct on {100} and {102}

Not Available

1.7 Mohs Hardness

5-6.5

1.8 Chemical Composition

Ni3(AsO4)2•8(H2O)

SiO 2 + H 2OUlrich Henn and Claudio C.

Annabergite and Boulder Opal Chemical Formula

While comparing Annabergite and Boulder 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 Annabergite and Boulder Opal chemical formula.

Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Green Gemstones

Annabergite Vs Beudantite

Annabergite Vs Chlorite group

Annabergite Vs Cavansite

Annabergite and Boulder Opal Specific Gravity

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

Green Gemstones

Arfvedsonite

Atacamite

Austinite

Bayldonite

Beudantite

Cavansite