Diamonds and precious stones, a popular account of gems .. (1874)
Dieulafait, Louis, b. 1830, Sanford, Fanchon, tr · New York, Scribner, Armstrong, and Company · leaf 308
MB-À ENGRAVING OF PRECIOUS STONES. 28/ and keeps always supplied to the edges of thewheel. This work is usually performed by thelapidary, preparatory to the engravers task; indeed,the stone is sometimes set by the jeweller before it … -^ / Fig. 125.—Apparatus for Sawing Hard Stones. is engraved, in which case it is embedded m cork.If it is merely shaped and not set, it is fastenedupon a baton with lapidarys cement. The tools and apparatus employed by the en-graver are therefore very simple; but just as the 288 PRECIOUS STONES.…
Precious stones · Diamonds · Gems
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