Low levels of radioactivity were found in some greenish yellow to yellow-green (peridot-like) synthetic spinel-and-glass triplets, mirror-backed glass rhinestone chatons and fully fashioned glass rhinestones.
Read MoreThe spinel used in jewellery is a small part of a group of minerals that share the same crystal structure. Not all of them form transparent crystals suitable for jewellery use, however. Spinel offers a range of hues, from orange to intense “traffic light” red, vibrant pink and all shades of purple, blue and violet through to bluish green.
Read MoreThe Black Prince’s Ruby. The Timur Ruby. For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels
Read MoreSpinel is a good candidate for the title of “History’s Most Under-appreciated Gem”. Some ancient mines that supplied gems for royal courts from Rome to China produced spinel, but it was usually confused with better-known stones like ruby and sapphire.
Read MoreThis article, from the Autumn 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.
Read MoreLearn about spinel's durability and how to care for your spinel jewellery.
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Found in nearly every colour – most notably red, pink and blue – spinels are popular gemstones because of their abundance, moderate cost and attractiveness.
Read MoreFrom the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
Read MoreThis article, from the Winter 1991 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
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