Boulder Opal and Pyrope Spessartine Physical Properties

Boulder Opal

Pyrope Spessartine

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.253.62-4.33

1 7.18

1.5 Fracture

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

Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)

1.6 Cleavage

Not Available

1.7 Mohs Hardness

5-6.57-7.5

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Boulder Opal and Pyrope Spessartine Chemical Formula

While comparing Boulder Opal and Pyrope Spessartine 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 Boulder Opal and Pyrope Spessartine chemical formula.

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Pyrope Spessartine- Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Boulder Opal and Pyrope Spessartine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Pyrope Spessartine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Pyrope Spessartine Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 3.62-4.33 whereas that of Pyrope Spessartine is 3.62-4.33.