gems, Broken Bangle, nomenclature, China

This Chinese national standard establishes standardized nomenclature for gems and jade materials used in the Chinese jewelry industry. It defines the principles governing the naming of natural gemstones, natural jades, natural organic gem materials, synthetic stones, artificial products, composite stones, and imitations, and specifies how treatments and other modifications should be represented in commercial names and identification documents. The standard is intended to provide consistent terminology for gem identification, testing, certification, trade, and consumer protection and to prevent misleading or ambiguous names in the marketplace. It provides an important framework for understanding official Chinese usage of gemstone and jade terminology and the distinctions made between natural materials, treated materials, synthetics, and imitations.