Standards of Diamond Appraisal
Jewelers around the world use the grading system developed by the Gemological Institute of America (GIA) that analyzes the carat weight, color, clarity, and cut of each gem. These are known as the 4Cs.
All center stone diamonds used in NIWAKA engagement rings are first graded by the GIA and then subjected to rigorous evaluation by in-house experts, ensuring that only diamonds of the highest quality are eventually selected.
In adherence with the Kimberley Process, all NIWAKA diamonds are certified as conflict-free.