Mong Hsu Ruby Mines
Mong Hsu Ruby Mines.
The Mong Hsu Ruby precious stone mining tract was officially opened in July 1992 in the area near the Salween Thanlwin River at the border region to Thailand about 180 km east of Mandalay in Myanmar by the government.
Until this time Mong Hsu was only a secondary village but after the declaration the town got very busy because it was known for decades that rubies are plenty there and more than 500 companies moved in.
Raw Ruby Stone with a rather odd size from Mong Hsu Myanmar also known as Burmese Ruby usually the finds are smaller the piece shown in the ruby photo above seems to have been falling down in a limestone cave due to erosion. This is the brown cover implicating.
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That is a rather new precious stone mining tract in Myanmar where many diggers often with very basic machinery are engaged in ruby and sapphire mining on properties with official concessions. More than five million carats were extracted and sold by 2002 which were flooding the ruby market and reducing the price of rubies for smaller stones per carat of around 20%.
Prices of natural ruby.
Local people were allowed to lease several 200 square feet of land for 3 years through tenders and this has been at a fixed price and immediately released to others at higher prices in particular plots of land with a reputation for quality gemstones are highly prized for the higher cost
this rental and sub rental chain. Many ruby mine rights were sold to local proxy who function as front for Thai dealers. They all are very experienced in the corruption infested business with Thai dealers.
Particularly interesting is the Loi Saung Htauk hill area.
Particularly interesting is the Loi Saung Htauk hill which consists of ruby grown on upper Paleozoic marble. Caves and holes are dug into the hill to preserve these marbles, after the marble is broken to extract rubies this mining area has the most valuable Burmese rubies of the area. Miners carve tunnels deep into the hill and sometimes at a depth of more than 100 meters.
Certain variants of rubies.
Certain variants of ruby gems are found in the limestone caves since they the fall of marbles due to the erosion of underground streams where the stones are buried in the sand. An open pit system is also practiced where sand and gravel are absorbed and sorted by a gravity separation system. Since the stones have a high magnesium content the gems have a bluish hue.
These raw ruby stones are not very attractive at first but when they are heat treated in special ovens they turn into beautiful red stones. Most of the gemstones are sold as rough stones mainly to gem merchants in Thailand who perform the heat treatment in Chanthaburi south of Pattaya in Thailand where a production chain of "Rubu Burner" has been established . In fact, almost all good rubies up to about 3 carats from Myanmar are heat treated mostly in Chanthaburi.