e/Umba sapphire

Information
has gloss	eng: Umba sapphire is a unique type of fancy sapphire discovered circa 1960 in the Gerevi Hills, north of the Umba River in the Umba Valley of Tanzania. Umba sapphires exhibit coloration not common to sapphires sourced from other parts of the world, and are recovered from the alluvial deposits of the Umba River (Tanzania).
lexicalization	eng: Umba sapphire
instance of	(noun) a crystalline rock that can be cut and polished for jewelry; "he had the gem set in a ring for his wife"; "she had jewels made of all the rarest stones" stone, gemstone, gem