Spravochnik Dlja Juvelira -

It provides immediate access to "hard-to-find" information like melting points and heating properties that are often missing from standard textbooks.

The handbook provides essential data for practicing jewelers, students, and retail professionals:

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

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

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

It serves as a counter reference to help explain technical aspects of gems and metals to consumers.