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Precious Yellow Sapphire
Yellow sapphires occupy the second line of the popularity rating immediately after the blue sapphires. Like other varieties, yellow and orange sapphires are distinguished by their high hardness, brilliant shine and many interesting shades. Visually, these solar corundums resemble expensive yellow diamonds. Cutters often use similar cutting methods that contribute to additional similarity. Correctly faceted corundums of yellow hue play in the light of sparkling flashes. Because of this, they are known as gold or sun sapphires. The cost of unfinished yellow sapphires directly depends on the size of the stone, on the purity and degree of saturation of the yellow color. Stones with a good cut of medium size - 3-5 carats, visually clean vary in price in the range of $700-1500 per carat.
There are many shades of crystal, ranging from pale to bright. The rarest samples include unheated crystals of golden yellow tonality of natural origin. They often have the trade name of golden (golden). Golden sapphires occasionally enter the jewelry market from Sri Lanka and Madagascar. The cost of such stones is $1500-3000 per carat, depending on the purity and size. Golden sapphires over 15 carats can cost more.
Green sapphires are just as rare and are found only in collectible jewelery. These stones have, as a rule, low color saturation and look actually gray. There are also instances with alternating greenish, yellow and blue zones, mined in the regions of Thailand, Australia and Madagascar. Such zonal sapphires are not often used in luxury jewelry, but are of great interest to collectors.
Price of yellow and orange sapphires
Above, we have already given examples of the cost of yellow sapphires, now let's summarize:
Yellow unfinished sapphires of average mass of 3-5 carats - $700-1500 per carat, depending on the purity and color saturation. After heat treatment, yellow sapphires are 1.5-2 times cheaper.
Top samples of yellow natural sapphires of the golden category "golden" - $1500-3000 per carat.
Heat-treated orange sapphires - $700-1500 per carat, depending on size, color, cut and clarity.
Orange sapphires after beryllium diffusion - $20-40 per carat, they are not used in expensive jewelry.
The cost of sapphires of yellow color is growing annually, these prices are averaged and relevant for the 2017-2018 year.