A certificate is an identification for a stone giving information about the identity, origin, possible treatments, and is delivered by an independent laboratory.
Specifications in the certificate are the following: dimensions, colour, transparency, type of cut, shape, heated or unheated, treated or not treated. Some of the certificates also specify origin of mining of the stone.
We work with several certification offices:
GRS, GUBELIN, TOKYO GEM LAB, SSEF, CARAT GEM LAB.
At Gem World we pride ourselves on providing our clients only with 100% natural gemstones. All our gemstones marked as "Unheated" are sold with a certificate, for the others a certificate can be issued on demand.