出典:Wikipedia
出典:『Wikipedia』 (2011/04/27 23:09 UTC 版)
Brian Gavin (born 14 November 1957) is a fifth-generation diamond cutter from South Africa. Referred to as “Brian the Cutter,” Gavin is best known for establishing a quality benchmark and grading system for hearts and arrows diamonds, a specialized precision-cut form of the round brilliant diamond.