I wish to know how to grade a diamond as VVS1, VVS2, VS1, and VS2.
What are their differences in distribution of inclusions and hence the price.

Actually I wish to buy one 1 Ct. I found that there are always at least one inclusion at the middle of the diamond for VS.

sam

HI,

你好!鑽石的淨度評級,會因內含物的顏色,大小,位置,明顯性而定,很難一概而論什麼區分,
通常VVS1-2,10倍鏡下觀察都較難找到內含物位置,
而通常VS1,10倍鏡下觀察會較近底部,VS2就較明顯.
VS1很多是都會在側邊,不一定在中間,
價格就會因淨度每高一級而調高,最明顯就是由VS1與VVS2會相差較多.

THX

SAM