Ludlamite and Alunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.1-3.2
2.6-2.9
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Conchoidal, Uneven
Cleavage
Vitreous, pearly on cleavage
On {0001}, perfect
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAl3(SO4)2(OH)6
Ludlamite and Alunite Chemical Formula
While comparing Ludlamite and Alunite 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 Ludlamite and Alunite chemical formula.
- Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
Ludlamite and Alunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ludlamite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.