![](http://www.alamy.com/thumbs/6/E4FB3058-DA7F-4E42-B41F-171612C8185E/RG854A.jpg)
. Bulletin - United States National Museum. Science. 146 BULLETIN 118, UNITED STATES NATIONAL MUSEUM. with a smaller curvature on the base than on the crown. The single cabochon is a characteristic cut for the turquoise. The hollow cabochon is adapted to very deep-colored transparent stones. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of t
. Bulletin - United States National Museum. Science. 146 BULLETIN 118, UNITED STATES NATIONAL MUSEUM. with a smaller curvature on the base than on the crown. The single cabochon is a characteristic cut for the turquoise. The hollow cabochon is adapted to very deep-colored transparent stones. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
Size: 2210px × 1130px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience