The institute's certification report says the stone is a "large specimen of unheated ... star blue sapphire weighs 1,395 carats. Sri Lanka's blue sapphires, also referred to as Ceylon sapphires ...
Thorndal showed two of her most popular stones from Madagascar: lavender spinel from the Bekily region and purple sapphire from Ilakaka (figure 1). Both materials are unheated and represent unique ...
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