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Angular Growth Zoning in Australian Sapphires104 viewsAngular growth zoning in sapphires from Australia. Such zoning may be found parallel to any of the crystal faces. It is never curved if viewed exactly parallel to the crystal face along which it formed. (Photos by Richard Hughes)
Sapphire, natural92 views
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Lechleitner synthetic Emerald85 views
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Unheated Mogok Sapphire104 viewsA rutile silk spider’s web spun beneath the facets of an untreated Sri Lankan sapphire. (Photo: R.W. Hughes)