Gemstone Review –
The Fiery Red Ruby - The most precious jewel of all - ruby gemstone [ad_1] ruby gemstone -
The finest and highest quality ruby is so rare that it is the most valuable gemstone in the world for thousands of years. In fact, even today, high-grade, flawless rubies are more valuable and rare than high-quality clear diamonds. A 16 carat ruby auctioned at Sotheby's in 1988 at a price of 227,301 USD per carat. A 27.37 carat ring of Burmese ruby sold for $ 4 million at Sotheby's in Geneva in May 1995, or $ 146,145 per carat. A 32 carat ruby was sold for $ 144,000 per carat at Sotheby's in 1989. In contrast, eight impeccable D-colored diamonds inside more than 50 carats were sold in the last 9 years and most importantly, a form of 125,000 USD per carat. The best rubies are so rare that even the world's largest gemstone dealers have to sift through the rich estate sales and auctions to find them. Bright, shiny stones larger than five carats are particularly rare.
Ruby is the gemstone form of corundum, one of the most durable minerals that exists, a crystalline form of aluminum oxide. The corundum has a hardness of 9 on the Mohs scale and is also extremely resistant. In its current form, corundum is even used as an abrasive. Corundum colors other than red are called sapphire. The chrome element is responsible for the red color of this gem, but too much chrome can actually turn to emerald green corundum. Heat treatment is very common in ruby gemstones (as for all forms of corundum) and is used to dissolve "silk" inclusions, resulting in a more transparent and colorful stone. Heat treatment is considered permanent and usually does not affect the value of the stone.
The most famous source of beautiful rubies is Burma, which is now called Myanmar. Myanmar's ruby mines are older than history: Stone Age and Bronze mining tools were discovered in the Mogok mining area. The rubies of Mogok's legendary mines often have a pure red color, often described as "pigeon blood", although this term is more fanciful than a standard practice in commerce today. Myanmar also produces intense pink red rubies, lively and extremely beautiful. Many Burmese rubies have a strong fluorescence when they are exposed to ultraviolet rays, such as those from the sun, which overlap with extra color. Rubies from Burma have a reputation for keeping their color bright in all lighting conditions.
There are also beautiful rubies in Thailand. Thai rubies tend to be of a darker red tone: a real red, tending towards burgundy rather than pink, as do Burmese rubies. This makes them very popular in the United States, where consumers generally prefer their rubies to be a darker red than a darker rose. Some Thai rubies have black highlights, a phenomenon called extinction, which can make their color darker than it actually is. But Thai rubies can also have a rich bright red that rivals the intensity of the Burmese. Rubies from Sri Lanka can also be very beautiful. Many Sri Lankan stones are often pinkish in color and many are pastel colored. Some, however, resemble the bright pinkish red hues of Burma.
The rubies of Kenya and Tanzania surprised the world when they were discovered in the sixties because their color rivals the best in the world. Unfortunately, most of the ruby production in these countries has many inclusions, tiny flaws that reduce transparency. Rubies from African mines are rarely transparent enough to be faceted. However, their fantastic color is fully highlighted during the cabochon style cut. Some rare clean stones of superior quality have been observed.
The most important factor in the value of a ruby is color. The main qualities are as red as you can imagine: a pure spectral hue saturated without any shade of brown or blue. An intense pure and intense red color is the most precious gem. Clarity is also of secondary importance, but a colored gemstone with slight flaws is always appreciated. Large rubies are rarer than diamonds and a fine gemstone value increases considerably (more than other gems) with increased weight.
The red word is derived from Latin for ruby, ruber, which is derived from similar words in Persian, Hebrew and Sanskrit. The intensity of the color of a fine ruby looks like that of a fiery coal, probably the most intensely colored substance ever seen by our ancestors. It is no wonder that they have attributed magical powers to these everlasting fires that have never died out.
After color, other factors that influence the value of a ruby are clarity, size, and size. The perfectly transparent rubies, with no minimal defects, are more valuable than those with inclusions visible to the eye. Cutting can make all the difference when it comes to the appeal and liveliness of a ruby. A well-cut stone should reflect the back light evenly over the entire surface, with no dark or faded area in the center that can result from a stone too deep or too shallow. The shape must also be symmetrical and the varnish must have no cut or scratch.
Ruby sometimes displays a three-star and six-point star. These star-studded rubies are cut into a smooth dome-shaped cabochon cut to display the effect. The star is best seen when it is lit by a single light source: it moves through the stone as the light travels. This effect, called asterism, is caused by light reflected by tiny rutile needles, called "silk," oriented along the crystal faces. The value of rubies and star sapphires is influenced by two factors: the intensity and attractiveness of the body color and the strength and sharpness of the star. The six legs should be straight and also protruding. Starry rubies rarely have the combination of a translucent or transparent fine color and a sharp salient star. These jewels are precious and expensive.
–The Fiery Red Ruby - The most precious jewel of all