Gemology An Annotated Bibliography Author:John Sinkankas This widely acclaimed landmark bibliography contains over 7, 500 entries--predominantly books, but also periodical articles, from 1500 up to 1985, with some books published after that date. Destined to become a classic, since the name Sinkankas is synonymous with gemology...monumental...There is no other comparable book...a mandatory purcha... more »se. --REFERENCE BOOKS BULLETIN To say that the Sinkankas bibliography is the best gemological bibliography is to condemn it with faint praise. The book is astounding! --GEOLITERARY BULLETIN ...the most important book that a gemologist could have. --LAPIDARY JOURNAL« less