The rarest gemstone in the world is considered to be a transparent mineral of reddish-orange color, of which only one specimen has been found throughout history. It is regarded as a sensation for ...

"Mandarin garnet" specimens are the most in demand and the most expensive. Spessartine gem quality stones are rarely larger than 5 to 7 carats in weight. The mineral is also found in Africa, India, ...

This year and month marks 50 years for the purple mineral — Ontario’s designated gemstone, primarily found in northwestern ...