Galena and Ludlamite Physical Properties

Galena

Ludlamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.233.1-3.2

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

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

1.6 Cleavage

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

Vitreous, pearly on cleavage

1.7 Mohs Hardness

2.5-2.753-4

2 10

1.8 Chemical Composition

PbS

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

Galena and Ludlamite Chemical Formula

While comparing Galena and Ludlamite 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 Galena and Ludlamite chemical formula.

Chemical formula of Galena- PbS
Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Galena and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.