DIAMOND MOE GAUGE
This gauge is ideal if you need to accurately know a diamond size. 
It is very easy to use by placing the gauge at side and then at the top of diamond.
The size can then be found by checking the reference booklet.
It will measure Fine edge, Light edge, Medium edge and Heavy edge diamonds from 0.24 to 11.31 Carat. 
Brand New Moe gauge comes complete with 20 page reference booklet and protective pouch