Topaz and Pollucite Physical Properties

Topaz

Pollucite

Topaz

Pollucite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.572.86-2.94

1 7.18

1.6 Fracture

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

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

1.7 Cleavage

[001] Perfect

None observed

1.8 Mohs Hardness

86.5-7

2 10

1.9 Chemical Composition

Al₂SiO₄(F,OH)₂

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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