Caledonite and Herderite Physical Properties

Caledonite

Herderite

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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

5.6-5.762.90-3.02

1 7.18

1.5 Fracture

Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

[001] perfect; [100] distinct

Indistinct on {110}

1.7 Mohs Hardness

2.5-35-5.5

2 10

1.8 Chemical Composition

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Caledonite and Herderite Chemical Formula

While comparing Caledonite and Herderite 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 Caledonite and Herderite chemical formula.

Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

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Caledonite and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Caledonite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Caledonite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Caledonite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.