It serves as a counter reference to help explain technical aspects of gems and metals to consumers.
Справочник ювелира. Брюс Кнут стоимостью 699 руб. spravochnik dlja juvelira
Contains weight conversion charts, chemical preparation formulas, and comprehensive ring size gauges. It serves as a counter reference to help
The primary reference matching your request is the by Bruce J. Knuth (often cited in Russian as Брюс Дж. Кнут, "Справочник ювелира" ). Overview of the Handbook chemical preparation formulas
While Knuth’s work is the most prominent "Sprovochnik," other valuable guides include:
The spiral binding allows the book to lay flat on a workbench, making it a functional tool rather than just a reading material. Other Notable References