With the price of fine sapphire climbing to new heights in the late 1980s, the search is on for replacement blues. One gem that some dealers mention as a sapphire substitute is indicolite, a member of the tourmaline group whose name comes from indigo but whose finest colors more often suggest the menthol blue of topaz than the denim-to-dusky blues of corundum.
KeywordsFine Color Precious Stone Alternate Spelling Wide Color Blackish Blue
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