Star Ruby and Agate Opal Physical Properties

Star Ruby

Agate Opal

Star Ruby

Agate Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.101.98-2.50

1 7.18

2.4 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Conchoidal, Conchoidal, Gemstones of the world (2001)

2.5 Cleavage

Not Available

2.6 Mohs Hardness

Not Available5.5-6.5

2 10

2.9 Chemical Composition

Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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