Contains weight conversion charts, chemical preparation formulas, and comprehensive ring size gauges.

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

Includes an expanded list of gemstones with their physical characteristics, diagrams for over 40 cutting styles , and official diamond grading standards.

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

Справочник ювелира. Брюс Кнут стоимостью 699 руб.

Detailed information on the composition of precious metal alloys and official standards for gold and silver.