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Mottramite
Mottramite
☒

Sardonyx
Sardonyx
☒



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Mottramite
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Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.92.55-2.70
1 7.18
👆🏻

Fracture

Sub-Conchoidal
-

Cleavage

None observed
None

Mohs Hardness

36.5-7
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
SiO 2Ulrich Henn and Claudio C.

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