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Magnesite

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Magnesite and Petalite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Effervesces in hot HCl
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.92-3.12
2.40
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
1.6 Cleavage
[10 1 1] perfect
Perfect on {001}, poor on {201} with 38.5° angle between the two
1.7 Mohs Hardness
3.5-4.5
6-6.5
1.8 Chemical Composition
MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Magnesite and Petalite Chemical Formula

While comparing Magnesite and Petalite 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 Magnesite and Petalite chemical formula.

  • Chemical formula of Magnesite- MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Petalite- LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Magnesite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Magnesite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Magnesite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Magnesite is 2.40 whereas that of Petalite is 2.40.