Fine-color, large, and eye-clean (lacking visible inclusions) rubies like this 11.01carat (ct) stone from Myanmar (formerly known as Burma) are extremely rare and valuable. – Photo: Robert Weldon/GIA.
Scientists at the Institute of Minerals and Materials Technology (IMMT) found a new way to improve color, clarity and luster of red ruby — microwaves. Rubies are one of the world's most popular ...
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