Mong Hsu ruby

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Mong Hsu Ruby Mines

The Mong Hsu Gems Land

was officially opened in July, 1992, at the area near the Salween or Thanlwin River around 180km east of Mandalay by a government declaration.

Until that date this was a small village, after the declaration, the place virtually exploded since more than 500 companies moved in. They are engaged in mining gems at around 1600 plots with concessions. By 2002 over five million carats were sold, this flooded the market and the ruby price for smaller stones per carat went down to around 20% of before.

By tenders a lot of 200 square feet plots were available to lease for 3 years, this came with a fixed price and immediately was released to others for a higher prices, in particular plots with a reputation having high quality gemstones are in great demand beside of the higher costs

of this lease and sublease chain. Particular interesting is Loi Saung Htauk Hill which is composed of ruby bearing Upper Paleozoic Marble. Caves and holes are dug inti the hill to get these marbles, after the marble is broken apart to extract rubies, this mining plot has the highest valued Burmese rubies in the area. Miners carve tunnels deep into the hill and nearby sometimes with more than 100m depth.

Some precious stones

are also found in the limestone caverns since the fall off from marbles due to erosion from underground streams where the stones are buried in the sand. Open pit system is also practiced where sand and gravel are sucked up and sorted through a gravity separation system. Since the stones have a high amount of magnesium the gems have a bluish hue.

These stones are not very interesting in the first moment but when they are heat treated in special ovens they morph into pretty red stones. Most gems

Mong Hsu Town

are sold as rough stones mainly to gem dealers in Thailand who do the heat treatment there, the center for this type of business is Chanthaburi in Thailand. Actually almost all good rubies up to around 3 carat coming from Myanmar are heat treated.

Burmese rubies Ruby Selection
Burmese rubies search
Burmese rubies search and selection
Mong Hsu Ruby Mine
Pulling rubies embedded in marble
Mong Hsu Ruby Mine
Mong Hsu Ruby Mine in the Tunnel
Ruby in Marble
Mong Hsu Ruby in Marble at the mine
Burmese Rubies
Broken Mong Hsu Rubies im Marble
Burmese Rubies
Burmese Rubies at Mong Hsu Myanmar

At Chanthaburi

they also do "ruby burning" but mainly on local stones although most rubies traded at the gem market are heat treated gems from Myanmar. The heat treatment is twofold, one is to enhance color, the other is to let fractures disappear, they call that "healing". It is made by heating the gem together with borax and other chemicals.


 

 

 

 

 

 

 
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