01. Color　　02. Clarity　　03. Cut

Color stones are evaluated based on different criteria depending on the type of gemstone, but generally, they are assessed on how close they are to the "hue" and "tone (brightness and saturation)" considered beautiful within the respective gemstone category. Diamonds, on the other hand, are evaluated based on how close they are to being colorless.

Evaluation	Evaluation Criteria
SS	Color tones considered "high to highest rank" among the applicable gemstones Diamond grading guideline: D–G (colorless)
S	A "high rank" hue that fully captures the charm of gemstones Diamond grading guideline: G~H (nearly colorless)
A	"Mid-rank" tones that capture the charm of gemstones Diamond Evaluation Guide: I~J (Slight Color Tint) Example). Champagne Color Diamond
B	"Mid-rank" tones that capture the charm of gemstones Diamond Evaluation Guide: K (with color)
C	Unattractive "Low-Rank" Tones Diamond Evaluation Guide: L (Strong Color)
D	"Low-rank" tones that lack appeal Diamond Evaluation Standard: M or below

Inclusions within gemstones and surface scratches or chips not only catch the eye themselves but can also interfere with light reflection, negatively affecting the brilliance. We assess the presence of inclusions, scratches, and chips, as well as their minimal impact on the sparkle.

We evaluate the inherent brilliance of the gemstone and whether the cut enhances its appeal.

As a rough guideline, please imagine the line between A and B as representing the general quality with a high volume of circulation. For gifts or special purchases, we recommend a "Overall Rating: A or above," which offers sufficient appeal.