I like that Yoga Undressed focuses on practical knowledge rather than just theory.
Product Tag: John Sinkankas
Gem Cutting: A Lapidary’s Manual, 2nd Edition by John Sinkankas (English) Paperb
The revised edition reorganizes the first few chapters for a smoother start.
Field Collecting Gemstones and Minerals by John Sinkankas (English) Hardcover Bo
This student textbook comes with a code for online practice quizzes.
GEM Cutting: A Lapidary’s Manual by John Sinkankas (English) Hardcover Book
The spine of this holy book has a subtle gold lettering.
John Sinkankas Quartz Symposium: April 12, 2003
A nice detail is that this first edition textbook includes illustrated problem-solving steps.
Mineralogy: A First Course by John Sinkankas (1966, Hardcover)
This textbook is used in many universities across the country.
