Quality assessment of Sapphire and Ruby

Due to quality natural rubies and sapphires are generally small, and decay at a faster rate every year, so its value and value-added features than diamond. Compared with the diamond, as the actual situation is more complex and less research, and evaluation of Ruby and Sapphire is much harder than diamond. But the industry still has some generally accepted evaluation based on these bases include color, weight, transparency, clarity, processing, and so on.

Due to quality natural rubies and sapphires are generally small, and decay at a faster rate every year, so its value and value-added features than diamond. Compared with the diamond, as the actual situation is more complex and less research, and evaluation of Ruby and Sapphire is much harder than diamond. So far, there is no internationally accepted standards. In terms of evaluation of Ruby and Sapphire, different reviewers based on their knowledge and experience will give different results. But the industry still has some generally accepted evaluation based on these bases include color, weight, transparency, clarity, processing, and so on.
, Color
Rubies and sapphires including color, hue, and saturation of the color. Colors are divided into five categories, excellent, very good, good, good, bad; color shades are divided into five categories: very deep, dark, medium, light, and very shallow; saturation by vividness is divided into five categories: very high, high, medium, low, low. As far as the color and tone. Natural Ruby and Sapphire cannot appear as a single spectral color, which will be divided into main color and color, Ruby Red, asked with a faint yellow, blue and purple; mainly blue Sapphire, there might be a faint yellow and green tones. In principle, the color of rubies and sapphires the closer to the ideal spectral color, higher color quality. Pigeon blood red in Burma and Kashmir Sapphire, cornflower and ideal spectral color is close to, and therefore the best quality. If the proportion of larger less pure color, lower the color quality.
Most valuable Ruby pigeon blood red is the color of tick, followed by the lighter purple. Transparent Ruby Red, slightly brownish red, rose, pink was considered less than ideal color. Star Ruby, however, these colors are also very popular.
Sapphire, generally considered the ideal color is pure and uniform supervision. For Golden Sapphire, but, due to its more rare Sapphire fire, coupled with the strong brightness more. Which is also very popular. Sapphire with color effects, because it can be fake stone, is very rare, it is also very likeable. Blue, yellow, and color changing Sapphire is the most popular on the market of several colors.

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Quality assessment of Sapphire and Ruby
Due to quality natural rubies and sapphires are generally small, and decay at a faster rate every year, so its value and value-added features than diamond. Compared with the diamond, as the actual situation is more complex and less research, and evaluation of Ruby and Sapphire is much harder than diamond. But the industry still has some generally accepted evaluation based on these bases include color, weight, transparency, clarity, processing, and so on.
Due to quality natural rubies and sapphires are generally small, and decay at a faster rate every year, so its value and value-added features than diamond. Compared with the diamond, as the actual situation is more complex and less research, and evaluation of Ruby and Sapphire is much harder than diamond. So far, there is no internationally accepted standards. In terms of evaluation of Ruby and Sapphire, different reviewers based on their knowledge and experience will give different results. But the industry still has some generally accepted evaluation based on these bases include color, weight, transparency, clarity, processing, and so on.
, Color
Rubies and sapphires including color, hue, and saturation of the color. Colors are divided into five categories, excellent, very good, good, good, bad; color shades are divided into five categories: very deep, dark, medium, light, and very shallow; saturation by vividness is divided into five categories: very high, high, medium, low, low. As far as the color and tone. Natural Ruby and Sapphire cannot appear as a single spectral color, which will be divided into main color and color, Ruby Red, asked with a faint yellow, blue and purple; mainly blue Sapphire, there might be a faint yellow and green tones. In principle, the color of rubies and sapphires the closer to the ideal spectral color, higher color quality. Pigeon blood red in Burma and Kashmir Sapphire, cornflower and ideal spectral color is close to, and therefore the best quality. If the proportion of larger less pure color, lower the color quality.
Most valuable Ruby pigeon blood red is the color of tick, followed by the lighter purple. Transparent Ruby Red, slightly brownish red, rose, pink was considered less than ideal color. Star Ruby, however, these colors are also very popular.
Sapphire, generally considered the ideal color is pure and uniform supervision. For Golden Sapphire, but, due to its more rare Sapphire fire, coupled with the strong brightness more. Which is also very popular. Sapphire with color effects, because it can be fake stone, is very rare, it is also very likeable. Blue, yellow, and color changing Sapphire is the most popular on the market of several colors.
Zircon
Zircon
Second, the weight
Natural gem-quality Ruby particles are very small, rare 1ct, is greater than the 5ct who rarities, so gem, the greater and greater increases in the price per carat, premium than its carat diamond. So far, Hong Bao million carats of premium level occurred mainly in LCT, 3ct, 5ct and 10ct. So far, the world’s biggest Ruby found in Myanmar, 3450ct. Famous pigeon blood red Ruby, only the largest weight of 55ct, largest Star Ruby is produced in Sri Lanka, 387ct, these are the world famous treasures.
Sapphire more yield than rubies, few carats by common, dozens of carats were rare, but 100ct are still very rare. Blue House found in the world’s largest stone weighs 19kg, native to Sri Lanka. One is called “stars of Asia” giant star sapphires, weighs as much as 330ct, is a world famous treasures. Set in United Kingdom Crown cross Center of the “Saint Edward sapphires”, is also the world famous treasures. Generally speaking, natural Sapphire much lower price than natural Ruby.
Compare with Ruby, Sapphire weighs on the value of its influence is much smaller, but also have a greater impact. Greater weight, higher prices per carat.
Third, transparency and clarity
To transparent Ruby and Sapphire, the evaluation should consider the clarity and transparency. The more pure, transparent Ruby and Sapphire, the price is higher, but are completely transparent, no time, no crack Ruby is hard to come by. Because under 10 times magnification, small defects where Ruby there, or the various inclusion. In very rare cases, the transparency and clarity of the Ruby naturally lower.
Due to the fairly pure transparent sapphires are easy to find, for purposes of evaluation of Sapphire, clarity, and transparency requirements are much higher than Ruby. Really good quality Sapphire, generally require pure, transparent, not high purity and transparency, its price will be greatly affected.
Four, machining technology
Evaluation of Ruby and Sapphire-another important factor is the processing of precious stones, add not only affect the appearance of the plant, but also the color. High quality Ruby and Sapphire require cut to size at the bottom. If the bottom is too shallow, to make the Center a “dead zone” If the bottom is too deep, it will affect transparency, regular disorder, affecting both the mosaic. That happens, prices will be greatly reduced.
Star rubies and sapphires should be evaluated separately. Must be equipped with the desired color and uniform color, flawless, polished and fine condition, more importantly star brightness, shape, location, soundness, and proportion. The brighter the star line, shape the rules the better. Intersection of the star line requirements located in the apex of the dome-shaped stones. Deviation from the vertex, will seriously affect the price of a gem. In addition, Star gems require star line is thin and straight, intact, as there was a shortage of bright lines, bent off on line and on line also would seriously affect its price. The processing of precious stones are also important considerations, specifically considering the weight below the Girdle. The ideal ratio of gem Girdle weight total gem weight for the following part l/4 hinge to fit, too heavy to increase the weight of precious stones but will affect the stone’s color, the brightness of the stars, and beautiful. Jeweller in order to get a higher rate of interest, gem Girdle the following parts will be too large, which make consumer attention.

Source: http://www.ch-microtek.com/