1 Physical Properties
1.1 Tenacity
1.1 Solubility
Effervesces in hot HCl
Not Available
1.3 Durability
Not Available
Not Available
1.7 Specific Gravity
2.92-3.122.85-3.35
1
7.18
1.27 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
1.28 Cleavage
[10 1 1] perfect
Indistinct
1.30 Mohs Hardness
1.33 Chemical Composition
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.