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In context to diamond grading: VS1 is when you can see flaws with a 10X microscope, but it takes a long time (more than about 10 seconds).

A higher quality diamond.
I use to do the baguettes, but now that I've came up I do VS1's.
by Zyphix September 26, 2008

Words related to VS1

diamond grading vs 1 vs-1