Given the wide variety of colors found in diamonds, the task of identifying the natural color origin of a diamond is complex. For many decades, GTLI has graded fancy colored diamonds and has developed a scientific expertise paramount to accurately describing a diamond’s color.

GTLI has the experience and knowledge, backed by full scientific equipment, to identify the exact color origin and color description of both colorless and fancy colored diamonds.

Only a professional diamond grading laboratory, like GTLI, has the ideal conditions necessary to differentiate and grade colored diamonds, and to identify color origin as natural, processed, artificially treated or as synthetic. GTLI is consistently relied upon to protect diamond dealers, jewelry consumers, and passionate collectors.