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Abdominal muscles finest, excellent ruby can be so rare it has become our planet’s most valued gemstone for thousands of years. In fact, even today, flawless good quality rubies will be more 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. In comparison, eight D-color internally flawless diamonds over 50 carats were purchased from earlier times 20 years as well as the largest, a pear-shape of 102 carats, fetched just US$125,000 per carat. Top rubies are really rare the world’s top gem dealers must incessantly comb through wealthy estate sales and auctions to discover them. Clean bright stones in sizes above five carats are particularly rare.

Ruby may be the gem quality type of the mineral corundum, and one of the very most durable minerals which exists, a crystalline kind of aluminum oxide. Corundum features a hardness of 9 around the Mohs scale and is also quite challenging. Rolling around in its common form, corundum is even used as an abrasive. Colors of Corundum apart from red are classified as Sapphire. The element Chromium is in charge of the beautiful red colors with this gem, but too much Chromium can turn corundum emerald green coloured. Heat treatment solutions are very common in ruby gemstones (as is true for many types of corundum) which is employed to dissolve "silk" inclusions, which leads to a far more transparent, more intensely colored stone. The heat treatment is considered permanent and does not usually detract from the value of the stone.

The most common source of fine rubies is Burma, which can be now called Myanmar. The ruby mines of Myanmar are older than history: stone age and bronze age mining tools have been discovered from the mining division of Mogok. Rubies through the legendary mines in Mogok will have a pure red colorization, that is described as "pigeon’s-blood" although that term is more fanciful than a real practical standard in the trade today. Myanmar also produces intense pinkish red rubies that happen to be also vivid and beautiful. Lots of the rubies from Burma have a strong fluorescence when subjected to ultraviolet rays like those who work in sunlight, which layers on extra color. Burma rubies have a very status for holding their vivid color under all lighting conditions.

Fine rubies can also be present in Thailand. Thai rubies are usually darker red in tone: a real red, tending toward burgundy as an alternative to pink, as Burma rubies do. This may cause them very popular in the United States where consumers generally prefer their rubies becoming a darker red instead of a darker pink. Some Thai rubies have black reflections, a phenomenon called extinction, that makes their color look darker than it really is. But Thai rubies could also have a rich vivid red that rivals the Burmese in intensity. Sri Lankan rubies can be very beautiful. Many Sri Lankan stones will often be pinkish in hue and several are pastel in tone. Some, however, resemble the vivid pinkish red hues from Burma.

Rubies from Kenya and Tanzania surprised the globe after they were found inside the sixties since their color rivals earth’s best. Unfortunately, the majority of the ruby production readily available countries has numerous inclusions, tiny flaws which diminish transparency. Rubies from the African mines are rarely transparent enough to facet. However, their fantastic color is displayed to full advantage when cut cabochon style. A few rare clean stones result that are top quality.

The most important take into account the need for a ruby is color. The most notable qualities are as red obviously: a saturated pure spectral hue without overtones of brown or blue. Cardiovascular pure, red color, uniform color is regarded as the valuable gem. Clarity is also of secondary importance, but a fine colored gem with slight flaws remains to be greatly regarded. Large sizes rubies tend to be more rare than diamond plus a worth of fine gem ruby increases significantly (way more than other gems) to comprehend weight.

The saying red comes from the Latin for ruby, ruber, which can be based on similar words in Persian, Hebrew, and Sanskrit. The intensity of shade of a fine ruby is similar to a glowing coal, one of the most intensely colored substance our ancestors ever saw. It’s no surprise they ascribed magical powers to those fires that burned perpetually and not extinguished themselves.

After color, the other factors which influence the value of a ruby are clarity, cut, and size. Rubies which might be perfectly transparent, without tiny flaws, tend to be valuable than those with inclusions that happen to be visible on the eye. Cut can make a difference in how attractive and lively a ruby seems to a persons vision. A well-cut stone should reflect back light evenly across the surface without a dark or washed-out area in the center that will result from a stone that is too deep or shallow. The design should be symmetrical where there shouldn’t be any nicks or scratches within the polish.

Ruby sometimes displays a three-ray, six-point star. These star rubies are decline in an easy domed cabochon cut to show off the effects. The star is the most suitable visible when illuminated with a single source of light: it moves through the stone since the light moves. This effect, called asterism, is because light reflecting off tiny rutile needles, called "silk," that are oriented across the crystal faces. Value of star rubies and sapphires are influenced by two things: the intensity and wonderful one’s body color as well as the strength and sharpness in the star. All six legs ought to be straight and equally prominent. Star rubies rarely hold the combination of a good translucent or transparent color and a sharp prominent star. These gems are valuable and dear.

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