![yellow gems yellow gems](https://royalbaloo.com/wp-content/uploads/2016/07/DotMarkerLetterSs-632x1024.jpg)
The most common use for rubies is jewelry-stunning jewelry! However, both natural and synthetic rubies are used in a variety of applications-such as watchmaking, medical instruments, and lasers-because of their incredible strength and red fluorescence. Rubies have been found at several localities in Thailand, in gravels with sapphires and spinels they are generally of dark colour, often inclining to a deep reddish brown. Its best known localities are in north-central Myanmar (Burma), northeast of Mandalay, where the gemstone occurs in bands of crystalline limestone associated with granitic and gneissic rocks. However, in the United States, a minimum color saturation must be met to be called a ruby otherwise, the stone will be called a pink sapphire. Its colour varies from deep cochineal to pale rose red, in some cases with a tinge of purple the most valued is a pigeon-blood red. Generally, gemstone-quality corundum in all shades of red, including pink, are called rubies. The ruby gemstone is composed of transparent red corundum, a mineral form of aluminum oxide. Ruby is a mineral of very limited distribution. The opaque cab would be considered more valuable. The other is an opaque cabochon with a 100% green to red color change. One gem is eye clean, with a 50% greenish blue to brownish red color change. For example, take two alexandrite of equal size. However, an alexandrite’s color change has more effect on its value than its clarity. As is the case with a majority of gems, most naturally occurring alexandrite isn’t clean, facetable material. Over one carat, the prices range from $50,000 to $70,000 per carat! Clarity also plays a significant role in grading. In sizes up to one carat, top-quality natural gems can sell for up to $15,000 per carat. Blue-greens and purplish or brownish reds hold less value. Thus, the most valuable gems would have a 100% color shift from pure green to pure red. Alexandrite can exhibit everything from 100% to just 5% color change. Second, the more distinct the color change, the higher the value. First, the closer the colors to pure green and red, the higher the value.
![yellow gems yellow gems](https://i.pinimg.com/736x/1f/cf/58/1fcf58650cd01e1b92178db07f704bfd.jpg)
How are Alexandrite priced?Īlexandrite have two primary value drivers. It shares its status as a June birthstone with cultured pearl and moonstone. (Emerald also requires these two elements).īecause of its scarcity, especially in larger sizes, alexandrite is a relatively expensive member of the chrysoberyl family. To form, alexandrite requires both beryllium (Be), one of the rarest elements on Earth, and chromium (Cr). If not for alexandrite’s popular associations, the circumstances necessary for its formation, combined with its mining history, might have ensured the gem would be little known as well as extremely rare. Originally discovered in Russia’s Ural Mountains in the 1830s, it’s now found in Sri Lanka, East Africa, and Brazil, but fine material is exceptionally rare and valuable. Often described by gem aficionados as “emerald by day, ruby by night,” alexandrite is the very rare color-change variety of the mineral chrysoberyl. The stone’s prices are generally determined based on quality, meaning that a larger, lower-quality stone could be much cheaper than a smaller one that’s of a higher quality. Sapphires are sold from anywhere from US $25 per carat to well over US $11,000 per carat depending on colour and inclusions. They are sought after due to the depth of their colour, their hardness (which is second only to that of diamonds), their durability and their ability to sparkle in the light – a phenomenon known as lustre. Blue Sapphire stones are the most valuable naturally blue-coloured gemstones in the world. Sapphires can range in price depending on a number of factors.
![yellow gems yellow gems](https://thumbs.dreamstime.com/z/yellow-gem-isolated-14451789.jpg)
However, color preferences are a personal taste, like a flavor of ice cream. Gems that are of lower saturation, or are too dark or too light in tone are of less value. The highest prices are paid for gems that are pure blue and of vivid saturation. Violet, and green are the most common secondary hues found in blue sapphires. Blue sapphires are evaluated based upon the purity of their blue hue. These stones have been associated with royalty for several centuries already.īlue sapphire exists in various mixtures of its primary (blue) and secondary hues, various tonal levels (shades) and at various levels of saturation (vividness). When it comes to precious gemstones, blue sapphires have long been sought after, as they carry significant meaning. Sapphire is a precious gemstone, of the mineral corundum variety.