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Ludlamite
Spessartine
Spessartine and Ludlamite Physical Properties


Physical Properties
Tenacity
-  
-  
Solubility
-  
-  
Durability
-  
-  
Specific Gravity
3.1-3.2  
4.12-4.18  
Fracture
-  
Conchoidal  
Cleavage
Vitreous, pearly on cleavage  
{???} Distinct  
Mohs Hardness
3-4  
7-7.5  
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references  
Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)  
Optical Properties >>
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