Blue Violet Gem Named for a Country in East Africa

This page is the CodyCross answer for the clue below from London, Group 498, Puzzle 1 (Black Taxi Cabs).

Question is: Blue Violet Gem Named for a Country in East Africa

and the answer is: TANZANITE

Word Meaning:

TANZANITE — A trichroic violet-blue variety of the mineral zoisite mined in Tanzania, used as a gemstone.

Definitions from Wiktionary.