gems, minerals, history of gemology, talismans, rings, jewelry, garnet

Sinkankas: A charming melange of interesting facts, fancies, and anecdotes, in popular style, using the device of letters to an unnamed lady, and treating most of the mineral productions of importance, but with major emphasis laid upon gemstones. The latter, mineral and organic, are to be found in letters 1 to 17, 20, and in 32, with letter 35 treating talismans, hieroglyphic rings, and the stones that used in them. The appendix contains an identification table for minerals, arranged according to distinctive properties. An excellent work that provides instructive reading, although copies are now rarely obtainable.