Colored stone grading, unlike diamond grading, is a little less universally standardized in comparison. Despite this, a general consensus equates that stones of a more intense saturation, belonging to certain hues (and with more appealing tones) usually trend higher in the pricing scale. At the laboratory, we make use of the alphanumerical codes taught to gemologists at the Gemological Institute of America, each code represents a color-influencing trait of a gemstone. 'vslbG' for example, is an acronym for 'very slightly bluish green', one of the 27 possible hues assigned to gems on our report. Tone on the other hand, is depicted as a single digit number, ranging from 2 (very light) to 8 (very dark). Similarly, saturation stands on a scale as well, with grades ranging from 1 (grayish or brownish) to 6 (vivid). These three color trait indicators, give us guidance on how to properly evaluate the worth of colored stones, in coordination with other aspects like clarity, cut and carat weight.
At the laboratory, based in Quezon City, our G.G,'s are specifically trained to accommodate concerns from both the local and international gem trade. We provide assistance with gemstone identification in two forms- verbally delivered results or printed gemological reports. There are instances where people just want to find out or gain personal assurance about the identity of their item, and do not need printed documentation. Verbal results will save them on time and laboratory fees.
If you're in the area of Metro Manila, or nearby, and need your jewelry items examined for authenticity, please drop us a message on Facebook to schedule an appointment with one of our experienced gemologists.
