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Larvikite
Larvikite

Datolite
Datolite



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Larvikite
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Datolite
1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.592.90-3.00
Amber
1 7.18
1.4 Fracture
Not Available
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
1.5 Cleavage
Not Available
None
1.6 Mohs Hardness
6-6.55-5.5
Amber
2 10
1.9 Chemical Composition
Not Available
CaBSiO 4(OH)Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references