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October Birthstone
Opal
Mohs scale hardness: 5.5-6.5
The
October Birthstone Opal Mohs scale hardness: 5.5-6.5 The name opal is actually means “to see a change in color”. These Australias national gemst...
October Birthstone Opal Mohs scale hardness: 5.5-6.5 The name opal is actually means “to see a change in color”. These Australias national gemst...
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