One of the most popular traditional jewelry stones, ruby is exceptionally durable. The colors of the July birthstone — always red — can reach vivid levels of saturation. Fine-quality rubies are some of the most expensive gemstones,
The Jegdalek deposit in Afghanistan has produced rubies that rank with fine Mogok stones, but facetable material is in short supply. Many of these stones contain small areas of blue color. They are also strongly fluorescent. (If this deposit ever produces clean material, the market will surely take notice).
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