George Frederick Kunz on Wikipedia
External resources
- http://kunzresearch.blogspot.com
- http://library.usgs.gov/specoll.html#kunz
- http://www.farlang.com/gemstones/kunz_book_of_the_pearl/page_003
- http://www.farlang.com/gemstones/kunz_gems_and_precious_stones/page_001
- http://www.gia.edu/library/38410/bibliographies.cfm
- http://www.johnbetts-fineminerals.com/jhbnyc/articles/nycminerals1.htm
- http://www.usgs.gov/blogs/features/usgs_top_story/tracking-the-story-of-the-russian-crown-jewels/?from=title
- https://archive.org/details/bookofpearlhisto00kunz
- https://archive.org/details/catskillaqueduct00kunzrich