How The Gem Index researches and reviews information

Source hierarchy

We prioritize gemological institutes, peer-reviewed journals, geological surveys, museums, universities, mineralogical databases, and established reference works. A source supports only the claims within its real scope.

Publication gates

Scientific values require a source link and review state. Locality-specific results are not generalized without justification. Market observations require a date, currency, source, and quality assumptions.

Science and tradition

Historical beliefs and contemporary metaphysical traditions may be documented as culture. They are never presented as demonstrated medical effects.

AI and images

AI-created imagery is labeled as editorial illustration and cannot represent a documented specimen, mine, inclusion, or historical object. Authentic scientific documentation requires rights-cleared source imagery.