Diamonds that have not been located within a setting are known as loose diamonds. Moreover, loose diamonds must be purchased when it is issued with a certificate of appraisal or value.
Certification of a diamond must always be accompanied by independent third-party agency which is even identified as a diamond grading report. Diamond grading illustrates loose diamonds in terms of carats, clarity, color as well as cut. Those who carry out such activities are also known as gemologists who have obtained expertise in training in the field of geology. Therefore, gemology appreciates on the study and examination of valuable stones and gems.
When loose diamonds are issued with such a report is identified as certified. Therefore, those who think to invest in loose diamonds for further utilization in jewelry or various other purposes then they must purchase only certified loose diamonds. However, the purpose of a gemologist certification is simply not to allot monetary value on loose diamonds which occurs within the market. Nevertheless, the weight in terms of carats is absolute of valuation, nevertheless, if the gem consists of a “cottony” appeal within which can determine its importance negatively.
Certified diamonds are estimated which is identified as the SI3 Clarity Scale and the Color Scale. The Clarity Scale was created by the Gemological Institute of America (GIA) which starts from "FL" for "flawless" to I3 for "Imperfect," such as cracks and occlusions which are easily observed by unaided eye.
Colored diamonds are estimated on a scale that expresses the gems in terms of color and saturation which are labeled with a letter of the alphabet from D to Z, starting from almost colorless to gems along with a deep shade. Diamonds might be of any color where the color variations comprises of pink, green, blue, purple and amber, that are originated by chemical reactions at the time of formation of diamonds. Such gems can be valuable considerably other than white or clear diamonds.
The certification of diamonds are generally been done either by the GIA or the American Gem Society Laboratories which develops confidence level and safety among individuals when purchasing loose diamonds.