Ludlamite and Erythrite Physical Properties

Ludlamite

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.1-3.23.06

1 7.18

1.5 Fracture

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

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

1.6 Cleavage

Vitreous, pearly on cleavage

Perfect on {010}; poor on {100} and { 1 02}.

1.7 Mohs Hardness

3-4Not Available

2 10

1.8 Chemical Composition

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

Co3(AsO4)2•8(H2O)

Ludlamite and Erythrite Chemical Formula

While comparing Ludlamite and Erythrite 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 Erythrite 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 Erythrite- Co3(AsO4)2•8(H2O)

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Ludlamite and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ludlamite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 3.06 whereas that of Erythrite is 3.06.