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Natrolite
Natrolite
☒

Heliotrope
Heliotrope
☒



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Natrolite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.20-2.26
Uneven
Perfect on {110}
5-5.5
Na 2[Al 2Si 3O 10] · 2H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
-
-
-
2.61
-
None
6.5-7
SiO2

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Heliotrope Vs Sellaite

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