These CIBJO Blue Books are sets of grading standards and nomenclature for diamonds, colored gemstones, pearls, coral, precious metals and gemmological laboratories, compiled and updated by CIBJO Commisssions. 

Widely accepted as the set of global standard for the jewelery industry, the CIBJO Blue Books represent a standard derived from a consensus betweent he broad expertise within CIBJO's commisssions and individuals outside the commissions who have expresses interest in participating in the development of these guidelines.

The application of these guidelines is entirely voluntarily but it is recommended for all persons, partnerships and corporations in all the stages of the jewelry chain of distribution.

These books are living documents and work in progress subject to annual review a reaffirmation.

PDFs below are password protected, for the exclusive use of ICA members.

Describing itself as the “United Nations of the jewellery business,” CIBJO, the World Jewellery Confederation, represents the interests of all individuals, organisations and companies earning their livelihoods from jewellery, gemstones and precious metals. It is the oldest international organization in jewellery sector, having originally been established in 1926.

About Us

The ICA is a worldwide body specifically created to benefit the global colored gemstone industry by advancing and promoting the knowledge and appreciation of colored gemstones.
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