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Ludlamite
Ludlamite

Marble
Marble



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Ludlamite
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1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.7 Solubility
Not Available
Not Available
1.8 Durability
Not Available
Not Available
1.9 Specific Gravity
3.1-3.2Not Available
Amber
1 7.18
1.12 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Not Available
1.13 Cleavage
Vitreous, pearly on cleavage
Not Available
1.14 Mohs Hardness
3-4Not Available
Amber
2 10
1.8 Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Not Available