Ludlamite and Galena Physical Properties

Ludlamite

Galena

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.1-3.26.23

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

Subconchoidal, Brittle, Metallic

1.6 Cleavage

Vitreous, pearly on cleavage

Cubic perfect on [001], parting on [111]

1.7 Mohs Hardness

3-42.5-2.75

2 10

1.13 Chemical Composition

(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

PbS

Ludlamite and Galena Chemical Formula

While comparing Ludlamite and Galena 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 Galena 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 Galena- PbS

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Ludlamite and Galena Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ludlamite and Galena Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Galena Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 6.23 whereas that of Galena is 6.23.