How Science Safeguards Your Purchase of Gems
Published by the American Gem Society, and distributed to the stores that had achieved Certified Gemologist. 24 pages. 11.4 cm × 15.4 cm. Circa 1946-1947.
Each page is available in jpegs in two sizes:
- A web-sized image that is 656 × 902 pixels and can be deep-linked to. You can scroll from one web-sized image to the next.
- A full-size 600 DPI image that is 2624 × 3608 pixels. Click web-size to get to.
Also in PDF [with text recognition].
