Commodity expertise of jewelry

Abstract

Background. Jewelry is one of the components of material, ritual, cultural and historical heritage of mankind. Modern jewelry has acquired significant differences from those created in the past. Changes in the field of production and trade in jewelry explain the relevance of the analysis of cost indicators in the modern jewelry market and the feasibility of improving commodity expertise.
The aim of the work is to analyze the cost indicators on the jewelry market in Ukraine, to conduct their commodity expertise and to develop an algorithm for cost forecasting of jewelry in accordance with their quality characteristics.
Materials and methods. A database of initial data on jewelry present on the market was created in the following range: wedding rings, rings, pendants and earrings. All named products weigh up to 10 grams and are made of 925 silver and 585 gold. Most of them are decorated with precious and semi-precious stones or inserts that imitate them. To develop an algorithm for cost forecasting of jewelry, a mathematical model was built and the quality of the approximation was calculated according to K. Pearson.
Results. The results of the analysis of cost indicators in the modern jewelry market are described, and also recommendations for performance of tasks of their com­modity expertise are given. Three commodity groups of jewelry have been identified and an algorithm for predicting their value has been developed. A protocol for assessing the quality of jewelry and standards for visual comparison operations are presented. An approach to determining the estimated value of exclusive jewelry is proposed.
Conclusion. The general regulations of work of commodity expertise of jewelry are established.
Creating a mathematical model for cost forecasting of jewelry requires the compi­lation of a database of initial data of representative samples presented on the market. For each cost interval it is necessary to build a regression mathematical model that will ensure maximum consideration of pricing factors and the authenticity and reproducibility of the results of commodity research.
Commodity expertise of the cheapest jewelry can be carried out only on the basis of the value of the used precious metals. Medium-value jewelry requires market analysis and mathematical forecasting. Jewelry with precious stones of natural origin also requires analysis of databases on precious stones. More expensive jewelry (more than UAH 300,000 per sample) can be valued only at the value of the gemstone.