All Entries Tagged With: "Intaglio"

Jewelry Term Definitions – Alphabetical I’s

I. G. I. – International Gemological Institute (IGI) – the largest independent gem grading and appraisal institute in the world.
Inclusion – A solid, liquid, or gaseous particle of foreign matter within a mineral.  These can decrease the value of a stone, however sometimes, as in the case of a star sapphire, the inclusion is prized.
Ingot [...]