making this particular gem fall in the "good" category. Would indicate the gem has "Medium-dark" tone and "Strong" saturation of color. if the tone/saturation numbers were listed as " 6/5". The primary color is Red and there appears to be no noticeable secondary color. So, as an example, when you see a Ruby given the color " R", this would indicate the color is "Red" meaning and the second number in sequence is the Saturation of color in the gem. the first number is the Tone or lightness/darkness of a particular gemstone. The letters are abbreviations of the Color and Hues visible. You will normally see this system identified by a letter or set of letters, followed by two numbers. Various Hues, the Tone, and the Saturation of color in a particular gem is listed. The 3 charts below are based on the GIA (Gemological Institute of America) "Color Stone Grading System", where the Color with it's Gemological reports can cost $100 to $1,000, depending on the gem and how much detail you want on the report. The following links are to more reputable Gem Laboratories :ĪGL | AGTA | GIA | GRS | GUILD | GUBELIN | SSEF You should expect at least $100 fee for a written Gem Appraisal. If you are looking for a reputable Gem & Jewelry Appraiser, we recommend: Our Gem listings are based on the GIA " Color Stone Grading System". We use fully accredited Gemological Laboratories able to perform most of our Gemstone Identification and Diamond Grading of Gems and Jewelry. Many of our Gems already have a Gem Identification Reports listed online. We can supply Appraisals and/or Gemological Laboratory Certificates on any gem we sell, if requested. We feature only Genuine, Natural, Precious GemstonesĬlick on the underlined item of your choice to view selections available COLOR You will never find a synthetic gem in our Gemstone selections,
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