This is a NIWAKA ring. I am the second owner, having purchased it from someone who bought it at the NIWAKA Hakata Hankyu store. The ring itself has been cleaned once. [ROKA] Stone: Diamond Weight: 0.254ct Color: D Clarity: SI-1 Cut: EXCELLENT Fluorescence: NONE Material: Platinum 950 Size: 5.5 Size adjustment: Not possible * No engraving of initials, etc. * Cleaned at a jewelry store [Condition] Used ROKA: Used a few times Will sell to those who understand. [Accessories] Central Gemological Laboratory appraisal certificate Box Ring case [Remarks] The paulownia wood box has stains and the Sanada string has faded color from when I received it. The appraisal certificate has some stains. Please refrain from purchasing if you are sensitive to these issues. Returns are not accepted to prevent switching. * The following is an excerpt from the NIWAKA website ROKA Reflecting the future of the two of you in the light of the morning dew sparkling in the fresh green. NIWAKA rings are not just stackable. The overall volume and balance when stacked are beautifully arranged, creating a sense of unity in the design. The "scenes" and "stories" expressed in each ring also create a deeper world when stacked. "NIWAKA Diamond" The diamonds in the engagement ring have an excellent overall cut grade, polish, and symmetry, and are "NIWAKA Diamonds" cut so that the Japanese aesthetic "square" appears on the front. It embodies the Japanese aesthetic and the highest brilliance.