Diamonds and precious stones, a popular account of gems .. . Hope. It weighs nearly 6^ ounces, and cost$2325. It came from the mine of Cangayum, in thedistrict of Coimbatoor, in the East Indies. A magnificent beryl surmounts the globe in theroyal crown of England. It is perfectly clear, andof a lovely colour. It is cut in an oval form, and is2^ inches long, i^ in width, and i\ in depth. A celebrated aquamarine adorned the tiara ofPope Julius II. It measured 2^ inches in length,and 2-| in thickness. Notwithstanding a slightflaw, it was considered by amateurs a very remark-able gem. Caire mentio
Diamonds and precious stones, a popular account of gems .. . Hope. It weighs nearly 6^ ounces, and cost$2325. It came from the mine of Cangayum, in thedistrict of Coimbatoor, in the East Indies. A magnificent beryl surmounts the globe in theroyal crown of England. It is perfectly clear, andof a lovely colour. It is cut in an oval form, and is2^ inches long, i^ in width, and i\ in depth. A celebrated aquamarine adorned the tiara ofPope Julius II. It measured 2^ inches in length,and 2-| in thickness. Notwithstanding a slightflaw, it was considered by amateurs a very remark-able gem. Caire mentions an aquamarine which he hadseen in London that weighed when cut 250 carats,and was valued by its possessor at $465. ENGRAVING UPON AQUAMARINE. 139 In 1827, in the town of Mouzinskaia in Russia, asuperb specimen of aquamarine was found, valued,we are seriously told by the Russians, at S 111,600. ENGRAVING UPON AQUAMARINE. A considerable number of both modern andancient engravings are executed upon this gem represented in Fig. 66 is a part of the. Fig. 66.—Julia, daughter of Titus. collection of the National Library of France. It isthe head of Julia, the daughter of Titus, and issigned by the artist Evodus. It was mounted ori-ginally with sapphires and pearls, and formed partof the decorations of a reliquary belonging to theabbey of St. Denis. I40 PRECIOUS STONES. ENGRAVING UPON THE EMERALD. The brittle texture of the emerald prevented itfrom being a favourite with engravers, consequentlythere are few engraved emeralds. There is a description of a beautiful compositionexecuted in the middle ages upon this stone. Itrepresented the soul led away by the pleasures. CYMOPHANE. The cymophane is formed like the emerald, ofalumina and glucina. The cymophane of modern mineralogists is theoriental chrysolite, the chrysopal, and the chryso-beryl of the lapidaries. It is remarkable for itslively brilliancy, its polish, similar to that of thesapphire, and its warm gay tint. But
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgems, booksubjectprec
