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Riebeckite
Riebeckite

Howlite
Howlite



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Riebeckite
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Howlite

Riebeckite and Howlite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.28-3.442.45-2.58
Amber
1 7.18
1.5 Fracture
Uneven, Splintery, Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
None
1.7 Mohs Hardness
5.0-6.03-3.5
Amber
2 10
1.8 Chemical Composition
Not Available
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Riebeckite and Howlite Chemical Formula

While comparing Riebeckite and Howlite 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 Riebeckite and Howlite chemical formula.

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  • Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Riebeckite and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.