Thailand is the largest centre of treatment, cutting and trade of sapphire
. In addition to imported raw material, Thai corundum
is also processed. Sapphires and rubies have been produced since the end of the 19th century, and were intensely mined in the 1960s.
Ref: E.Ya. Kievlenko (2003) Geology of gems, p. 43
Gem list contains entries from all listed localities in region.
Gemstones from Thailand by Colour
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Localities in this Region