Buyer´s guide

The Basics of Colour Gems Valuation

Appreciating the meaning, and the relative importance of the 4 C´s, (COLOUR, CLARITY, CUTTING, and CARAT weight) is essential to evaluating the quality and value of colored gemstones...

Definitions and Gemstone Enhancement Codes

Most natural coloured gemstones are treated or enhanced to intensify the colour, diminish imperfections or improve durability...

Gemstone Certification and Identification

Gemstones are unique creations of nature and do not always submit themselves easily to identification or classification by gemologists. In some cases even gemological laboratories cannot agree regarding the treatment, the origin, or even the final classification of a particular gemstone...

Gemstone Appraisals

Gemstone values tend to increase over time, particularly top-quality gemstones, which are scarce and always in high demand...