2006-09-14 17:15:31 · 3 answers · asked by kathy a 1 in Science & Mathematics ➔ Earth Sciences & Geology
burma (Myanmar)
2006-09-14 17:17:27 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Thailand produces the most rubies by weight with Sri Lanka, Myanmar, India and Africa. A number of stones are now being mined in Madagascar. For quality Myanmar produces the best followed by Sri Lanka as these stones have only chromium as a colouring agent which gives the purest red. Stones from Thailand and other countries tend to have a proportion of iron in them as well which reduces the brilliance of the colour by inhibiting the bright red fluorescence to U.V. light which "pure" chromium stones exhibit.
2006-09-15 05:35:36 · answer #2 · answered by U.K.Export 6 · 0⤊ 0⤋
Myanmar 90-95% next to Madagascar this link may interest you it has other colour stones also including ruby scroll down
http://www.ganoksin.com/borisat/nenam/mine-production-update.htm
2006-09-17 06:07:27 · answer #3 · answered by Eric C 4 · 0⤊ 0⤋