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Ab muscles finest, top quality ruby can be so rare that it may be earth’s most valued gemstone for hundreds of years. Actually, right now, flawless top quality rubies tend to be valuable and rare than high quality colorless diamonds. A 16 carat ruby sold at auction for US$227,301 per carat at Sotheby’s in 1988. A 27.37 carat Burmese ruby ring sold for US$4 million at Sotheby’s in Geneva in May 1995, or $146,145 per carat. A 32 carat ruby sold for US$144,000 per carat at Sotheby’s in 1989. As opposed, eight D-color internally flawless diamonds over 50 carats were purchased in earlier times 9 years as well as the largest, a pear-shape of 102 carats, fetched a mere US$125,000 per carat. Top rubies are so rare perhaps the world’s top gem dealers must incessantly comb through wealthy estate sales and auctions to locate them. Clean bright stones in sizes above five carats are particularly rare.

Ruby is the gem quality form of the mineral corundum, the other of the extremely durable minerals which exists, a crystalline kind of aluminum oxide. Corundum features a hardness of 9 on the Mohs scale and is particularly quite challenging. In its common form, corundum is even utilized as an abrasive. Colors of Corundum other than red are called Sapphire. The element Chromium accounts for the red colorization on this gem, but too much Chromium can in fact turn corundum bright green colored. Heat treatment solutions are common in ruby gemstones (as they are true for all those forms of corundum) and it is accustomed to dissolve "silk" inclusions, which leads to an even more transparent, more intensely colored stone. The temperature treatment solutions are considered permanent and does not usually detract from the need for the stone.

The most common way to obtain fine rubies is Burma, that’s now called Myanmar. The ruby mines of Myanmar are more than history: stone age and bronze age mining tools have been discovered inside the mining section of Mogok. Rubies in the legendary mines in Mogok will have a pure red colorization, that is called "pigeon’s-blood" although that term is more fanciful than an authentic practical standard within the trade today. Myanmar also produces intense pinkish red rubies that happen to be also vivid and beautiful. Many of the rubies from Burma possess a strong fluorescence when subjected to ultraviolet rays like those invoved with sunlight, which layers on extra color. Burma rubies possess a trustworthiness of holding their vivid color under all lighting conditions.

Fine rubies will also be found in Thailand. Thai rubies usually are darker red in tone: a real red, tending toward burgundy instead of pink, as Burma rubies do. This will make them extremely popular in the United States where consumers generally prefer their rubies to be a darker red as opposed to a darker pink. Some Thai rubies have black reflections, a phenomenon called extinction, that will make their color look darker laptop or computer in fact is. But Thai rubies may also have a rich vivid red that rivals the Burmese in intensity. Sri Lankan rubies can also be very beautiful. Many Sri Lankan stones are often pinkish in hue and many are pastel in tone. Some, however, resemble the vivid pinkish red hues from Burma.

Rubies from Kenya and Tanzania surprised the world whenever they were discovered from the sixties since their color rivals our planet’s best. Unfortunately, most of the ruby production from all of these countries has lots of inclusions, tiny flaws which diminish transparency. Rubies in the African mines are hardly ever transparent enough to facet. However, their fantastic color is displayed to full advantage when cut cabochon style. Several rare clean stones are considered that happen to be excellent.

The most important take into account the price of a ruby is color. The very best qualities are as red obviously: a saturated pure spectral hue with no overtones of brown or blue. A rigorous pure, red color, uniform color is the most valuable gem. Clarity can be of secondary importance, however a fine colored gem with slight flaws continues to be treasured. Large sizes rubies tend to be more rare than diamond and a value of fine gem ruby increases significantly (in addition than other gems) to comprehend weight.

The phrase red is derived from the Latin for ruby, ruber, that’s produced from similar words in Persian, Hebrew, and Sanskrit. The power of colour of a good ruby is similar to a glowing coal, one of the most intensely colored substance our ancestors ever saw. It is no wonder they ascribed magical powers to these fires that burned perpetually rather than extinguished themselves.

After color, the opposite factors which influence the value of a ruby are clarity, cut, and size. Rubies which are perfectly transparent, without tiny flaws, tend to be valuable than others with inclusions which are visible for the eye. Cut can produce a big difference in how attractive and lively a ruby appears to the attention. A well-cut stone should reflect back light evenly throughout the surface without a dark or washed-out area from the center that can originate from a stone that’s too deep or shallow. The design ought to be symmetrical high should not be any nicks or scratches from the polish.

Ruby sometimes displays a three-ray, six-point star. These star rubies are decline in an effortless domed cabochon cut to display the result. The star is best visible when illuminated which has a single light: it moves throughout the stone since the light moves. This effect, called asterism, is caused by light reflecting off tiny rutile needles, called "silk," which are oriented along the crystal faces. Value of star rubies and sapphires are influenced by a pair of things: the intensity and appeal of the body color and the strength and sharpness in the star. All six legs needs to be straight and equally prominent. Star rubies rarely have the mix of a fine translucent or transparent color and a sharp prominent star. These gems are valuable and dear.

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