Black Diamonds: What You Need to Know - GIA 4Cs
WEBOct 11, 2016 · In fact, the actual body color of a natural black diamond may range from near-colorless to brown or “olive” green. Natural-color black diamonds typically are completely opaque, with a high luster that gives the stones an almost metallic appearance.
Diamond Treatments - GIA 4Cs
WEBThe process is very common for creating black diamonds. In fact, most black diamonds are treated. Since annealing is a stable treatment, GIA will grade annealed diamonds.
Diamond Treatments and What They Mean to You - GIA 4Cs
WEBFeb 24, 2014 · As a diamond consumer, you’ve probably heard the term “diamond treatment” or “treated diamond,” or perhaps “enhanced diamond” and wondered what that meant. A relatively small percentage of gem-quality diamonds are treated and they are treated for two reasons: to improve clarity or to alter color.
Where are Diamonds Found? Spotlight on South African …
WEBSep 19, 2023 · The GIA Diamond Origin Report provides a full and unbiased 4Cs assessment and clearly states a natural diamond’s country of origin. For added security, the diamond is laser inscribed with its unique report number.
What Is a White Diamond? - GIA 4Cs
WEBSep 13, 2016 · You’ll often hear the term “white” applied to colorless diamonds that fall within the GIA D-to-Z color scale or chart. But diamonds in the D-to-Z range are not white at all. Their hues can range from colorless (like a drop of pure water) to having tints of light yellow, light brown or gray.
What Are Simulated Diamonds? | Diamond Simulants | GIA - GIA 4Cs
WEBDec 20, 2016 · Simulated diamonds or diamond simulants are gemstones that resemble diamond’s appearance but have different properties than natural diamonds. Before you buy, learn their pros and cons here!
Changing a Diamond’s Color - GIA 4Cs
WEBOct 13, 2014 · The process is so commonplace, that black diamonds treated this way are more prevalent that natural color black diamonds. The approximately 5.75ct “black” diamond in the pendant is a slightly radioactive laboratory-irradiated very …
Fact Checking Diamond Fluorescence: 11 Myths Dispelled - GIA 4Cs
WEBMar 27, 2018 · FACT: The majority of diamonds do not fluoresce. In a study of more than 26,000 diamonds submitted for grading to GIA, researchers found that only approximately 25% to 35% of them exhibited some degree of diamond fluorescence when examined with a standard long-wave UV lamp.
Lab-Grown Diamond Jewelry: What are Synthetic Diamonds? - GIA …
WEBDec 13, 2016 · Do synthetic diamonds look like natural diamonds? Lab-grown diamonds have nearly the same physical and optical properties as natural diamonds. They are just as hard and are available in nearly as wide a range of quality and colors.
Simulants, Moissanite and Lab-Grown Diamonds - GIA 4Cs
WEBWe created the GIA iD100 ®, a desktop instrument to help jewelers distinguish natural diamonds from laboratory-grown diamonds, diamond simulants and some treated diamonds in under two seconds. Laboratory-grown diamonds can also be sent to gemological laboratories like GIA for identification.
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