How Is Gemstone Geographic Origin Determined?

Rokero Gems Editorial · Updated 4 October 2026

How laboratories use inclusions, chemistry, spectroscopy and reference data to form geographic-origin opinions.

Geographic origin is normally a laboratory opinion based on several observations rather than a simple visual guess.

Microscopic inclusions, trace-element chemistry and spectroscopy can be compared with reference samples from known deposits.

Origin is not a quality grade; colour, transparency, cut, treatment and overall appearance still vary greatly within one country.