![]() They are generally thought to involve a process called plastic deformation that distorts their molecular structures. The exact processes that create red diamonds still remains a mystery. Type IIB contains no nitrogen but does contain boron. Type IIA are chemically the purest, with no measurable nitrogen or boron impurities. These are the most sought by collectors and investors. Pure Type IaB diamonds are very rare because they usually mix with Type IaA in the same stone. The nitrogen atoms are paired in the matrix of Type IaA diamonds and clustered in Type IaB. Types IaA and IaB comprise around 98% of all gem diamonds IaA are largely found in Cape Province, South Africa while IaB are found in Buffalo Hills, Namibia, and Eurasia. There are nine grades in the intensity scale :Įach natural color has its own perfect storm of minerals, ambient pressures and temperatures, incubation time (usually eons), gases, elements and other factors as the diamonds form deep within the earth.ĭiamonds are scientifically classified as either Type I or Type II, depending upon whether nitrogen is present, and how it is configured within the matrix. Intensity refers to a stone's level of color saturation. Very High Pricing - the rarest diamond color: Red.High-Range Pricing - Pink, Purple, Violet, Green, and Blue Diamonds. ![]() Mid-Range Pricing - Intense and Vivid Yellow Diamonds and Orange Diamonds.More Affordable Pricing - Grey, Brown, and Fancy Yellow Diamonds.Other factors can also affect the overall value of diamonds. Other popular cuts include Rose, Asscher, Hearts and Arrows, and Modified Brilliant (in Pear, Heart, Marquise and Triangular shapes). The most common type of cut is the Round Brilliant cut. VVS1 and VVS2 (Very, Very Slightly Included).This C measures the amount of inclusions (other materials)on a 6-point scale at 10x magnification. One carat is the average weight of a carob bean. D is colorless, while Z has yellow or brown tones. The Gemological Institute of America (GIA) sets the worldwide standard for the color-grading of diamonds. consider the diamonds with the highest overall 4C averages.average out the remaining Cs for each stone. ![]()
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