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Request access to place orders online. Vitreous to adamantine. None, but may exhibit parting. Mineral Class. The color of Ruby ranges from bright red to dark reddish-brown.
The most preferred color is a deep blood red with a slightly bluish hue. Ruby from Burma is famous for its exceptional coloring, and has traditionally produced the finest Rubies.
However, Burmese Ruby rarely exceeds several carats; large flawless Burmese Rubies can be worth millions of dollars.
Heat-treating a Ruby can also increase its transparency by removing tiny internal flaw s. Inclusions of tiny, slender, parallel Rutile needles in Ruby cause a polished gem to exhibit asterism.
A Ruby displaying asterism is known as a " Star Ruby ", and if transparent can be very highly prized. Star Rubies exists in six ray stars, though twelve ray stars are also known.
Rubies must be have good transparency to possess gem value. Opaque or semi-opaque Rubies have relatively little value, even if they display asterism.
The same Rutile inclusions that are responsible for asterism in certain Rubies can also decrease transparency and cause a hazy effect known as silk.
Dazzling brilliance. Captivating color. Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.
Citrine is the transparent, pale yellow to brownish orange variety of quartz. Back to gem encyclopedia Ruby Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
Fine Mogok Ruby. Mixed Cut. Rods of synthetic ruby are used to make ruby lasers and masers. The first working laser was made by Theodore H.
Maiman in Ruby lasers are still in use. Rubies are also used in applications where high hardness is required such as at wear-exposed locations in modern mechanical clockworks, or as scanning probe tips in a coordinate measuring machine.
Imitation rubies are also marketed. Red spinels , red garnets , and colored glass have been falsely claimed to be rubies. Imitations go back to Roman times and already in the 17th century techniques were developed to color foil red—by burning scarlet wool in the bottom part of the furnace—which was then placed under the imitation stone.
From Wikipedia, the free encyclopedia. Variety of corundum, mineral, gemstone. This article is about the mineral or gem. For other uses, see Ruby disambiguation.
Natural ruby crystals from Winza , Tanzania. Artificial ruby under a normal light top and under a green laser light bottom.
Red light is emitted. Minerals portal. Archived from the original on March 21, Retrieved March 28, Colored Gemstones.
Gemstone Press. Archived from the original on May 2, Archived from the original on January 2, Archived from the original on April 26, Archived from the original on January 13, For rubies reasonably clear of inclusions or fractures, no special wear or care precautions are necessary.
On the other hand, heavily included or fractured rubies have less durability. Consult our gemstone care guide for additional recommendations.
Ruby and sterling silver forged leafy ring. Photo by Kirsten Skiles. Appraising rubies is a skill every jeweler and gemologist needs to master.
Learn about the different quality factors that can affect ruby prices. Richard Hughes has been a leading ruby expert for decades. Learn how he got started and his tips for newcomers to the world of rubies.
A traditional favorite, a ruby engagement ring stone symbolizes love and passion. Learn how to find the gem that best fits your budget and style.
Read about these eight famous rubies and what makes them special. What ruby and sapphire grading tools does a novice gemologist need?
Learn how basic gemological equipment can help you identify these popular…. Membership options. Ruby Value, Price, and Jewelry Information.
Ruby One of the most popular traditional jewelry stones, ruby is exceptionally durable. Ruby Buying Guide. See the entire Gem Price Guide.
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GG , Joel E. Arem, Ph. See other articles. Appraising Rubies Appraising rubies is a skill every jeweler and gemologist needs to master.
Choosing a Ruby Engagement Ring Stone A traditional favorite, a ruby engagement ring stone symbolizes love and passion.
Ruby and Sapphire Grading Tools What ruby and sapphire grading tools does a novice gemologist need? Join IGS today for great benefits!
Ready to learn how to identify gems on your own? Refractive Index. Very high-end rubies can be far more expensive — in some cases, either as expensive or more expensive than diamonds of the same size.
Like diamonds, rubies are assessed using certain quality factors. Of these, the most important, by far, is color. The stronger and more intense the color, the more valuable the ruby.
Finally, like with all gemstones, the carat weight of a ruby plays a role in its value, with a larger ruby commanding a higher value than a smaller one.
An exceptionally high-quality ruby that combines rich, natural color with other quality factors is exceptionally rare and often worth an incredible amount.
For example, this stunning As with emeralds , the most important factor when evaluating a ruby is its color. The deeper, and more intense the color, the more desirable the ruby.
The best ruby color is typically thought of as a deep, vivid red. However, rubies can look stunning in other colors, such as pink or brown-red.
Hue refers to where the ruby falls in the spectrum of other colors. Each ruby has a primary and secondary color. The primary color is red, and the secondary color is usually orange, purple or pink.
Some rubies mined from specific parts of the world are known to have certain secondary colors, such as rubies from Myanmar, which are known to have a slight purple secondary color.
Purple as a secondary color can actually be better in a ruby because it makes the red appear richer. Color tip: set a purplish red ruby in yellow gold , like they do in Burma.
The yellow color will neutralize the blue in the purple, making the ruby appear even more red. This brings us to our last color criterion, saturation.
Also, rubies that fluoresce glow in ultraviolet light can have even greater saturation. It should go without saying that if the color of a ruby is by far the most important factor, it would be crazy to even consider buying a ruby sight unseen.
This is the only way, for example, that gemologists can distinguish between pink sapphires and rubies.