Ruby millennium love 3-2
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Production of ruby
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Colored gemstones are found in mountains or underground,? often called "gem pockets." ?Sometimes we hear that gemstones are new found somewhere, ?and mining hunters flock there, but it may not take long to be completely mined and the ore sources exhausted. The mineral source of commercial production in the market refers to the stable output of gemstones. The level of mining of gem-deposits that can continue to supply the production capacity for jewelry market.
In the eyes of consumers, for high-quality rubies, traders or buyers will require unbiased gem identification units to provide expert opinion reports on different origins, maybe whether they have been treated or not. ?The "origin" label of gemstones has become a symbol of brand positioning.? In the world of colored gemstones, color and clarity ?is greatly affects the price. When purchasing rubies, one of the criteria for evaluating the value,? is whether the color has sufficient saturation and chroma.? Although the origin is often regarded as the price benchmark.? In fact, there can be considerable differences in quality from same mine.? For the one with higher quality is a rare treasure, while the one with low quality can even be used as a material for grinding agent. ?Therefore, basically , quality of the gem itself should still be main consideration when collecting.
Sri Lanka is an ancient gemstone source, and the alluvial deposits of this gem island are rich in various gemstones. Sri Lankan rubies have tend to lighter red or feel peach color, and texture makes them more fiery after cutting. Most of the colorful gemstones that Europe came into contact with in ancient times, many have been traded from here.
The rubies exported from the Mogok area of Myanmar in16th century. Still one of the most valuable gemstones in market nowaday. Other mines such as the Namya and Mong Hsu were only discovered at the end of the 20th century. Many Mong Hsu ruby crystals often have a deep blue color zone, and most undergo heat treatment to improve this color patch.
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The Jegdalek ruby deposit in Afghanistan has a mining history of more than 700 years. The rubies produced from the metamorphic marble deposit, have a delicate and beautiful character. The crystals produced have rich inclusions and are mostly cut into cabochon gemstones; ?Nearby Hunza Valley of Pakistan, it is said that Alexander the Great 320 BC once explored the deposit. ?Became a source of rubies in the 1960s. However, this is a primary ore source and terrain is complex and mining is difficult. The color is beautiful but poor clarity, output is quite limited.
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Ruby had been discovered in Thailand ( Siamese ) in 15th century, but it really became an important production area in Chanthaburi Province in 1970-80, some are still produced today. Thai rubies with orange-brown or deep purple-red color are famous for their good clarity and are used by many international brands. ?At that time, a large amount of ruby material was heat-treated to remove the blue tint. Today, many collectors are looking for unheated Thai rubies with good quality. Cambodian rubies are almost synonymous with Thailand, because the mines of both are located in same border.
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In early 1980s, rubies and pink corundum were discovered in marble rocks at Luc Yen area of northern Vietnam. ?Although mass production was not abundant, the rubies produced in Vietnam became increasingly important because their quality was close to that of Burmese rubies. During the same period, ruby found for the first time near Murgab town in Tajikistan. They are usually pink in color and have many inclusions.
Timeline of discovery of ruby origin
400 ?Ratnapura , Sri Lanka
1300 Jegalek, Afghanistan
1600 Mogok , Myanmar
1950 Longido , Tanzania
1960 Hunz Valley, Pakistan
1970 John Saul mine ,Kenya
1970 Chanthaburi/ Thailand ,
Trat、Pailin ?/ Cambodia
1980 Luc Yen , Vietnam
1980 Murgab, Tajikistan
1990 Mong Hsu/Namya , Myanmar