Principles and systems for commercial classification of amber from ancient times to the present day

Abstract

Amber classification plays a crucial role in its study, extraction, use in jewelry and amber art, various industrial sectors, and trade. This article provides a comparative analysis of classification systems and principles that have existed historically and are currently adopted in the main amber-producing and amber-processing countries (Russia, Poland, and Ukraine). The study does not address geological and mineralogical classifications of fossil resins or their physical and chemical properties. Instead, the focus is on classification systems used for practical production and commercial purposes during amber extraction, sorting, processing, and trade. Three fundamental levels of classification criteria for raw amber are identified: (a) weight or size, (b) stone structure (monolithic versus layered, presence or absence of cracks and impurities), and (c) decorative properties (natural shape, color range, and transparency). Additionally, the presence of animal and plant inclusions in amber, which hold both scientific and commercial value, is considered separately. The article concludes that the most advanced system of commercial amber classification in recent years has been developed and implemented at the Kaliningrad Amber Plant.