Gemstone encyclopedia
The Complete Guide to Gemstones
From precious to semi-precious. Properties, grading systems, pricing factors, treatments, and buying advice for every major gemstone used in jewelry.
Precious Stones
Semi-Precious Stones
Key Topics
- How gemstones are graded
- Natural vs treated stones
- Gemstone sourcing and origins
- Heat treatment and enhancement
- Certificate authorities (GIA, AGL, Gübelin)
- Pricing factors by stone type
- Care and maintenance guides
- Investment-grade gemstones