Diamonds and precious stones, a popular account of gems .. (1874)
Dieulafait, Louis, b. 1830, Sanford, Fanchon, tr · New York, Scribner, Armstrong, and Company · leaf 281
Fig. 106. Fig. 107. These are the proportions in which the axis iscut by the French lapidaries, but English lapidariesusually cut five-eighteenths from the upper pyra-mid, and one-eighteenth from the lower. Theupper and larger plane surface is called the table;the lower is named the collet (French,…
Precious stones · Diamonds · Gems
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
