This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ... favour. CHONDRONITE, a mineral that is found abundantly at the Tilly Foster mine in Brewster, Putnam County, New York, appears in ...Read MoreThis historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ... favour. CHONDRONITE, a mineral that is found abundantly at the Tilly Foster mine in Brewster, Putnam County, New York, appears in deep garnet-red crystals of great beauty. Chondron-ite is classed with the minor gems, and it deserves a more extensive use. Hardness, 6.5. It has a vitreous lustre. DIOPSIDE is a variety of pyroxene; hardness, 5 to 6; lustre, vitreous or greasy; transparent to translucent; and doubly refractive. Fine specimens, fit for gem purposes, are found near DeKalb, St. Lawrence County, New York. When cut brilliant, diopside makes a very attractive stone and resembles green tourmaline. DIOPTASE is a silicate of copper; other names for it are achirite and Congo emerald; hardness, 5. The softness and brittleness of this attractive stone disqualify it for extensive use. FLUORITE or fluorspar, of which chloro-phane or cobra stone is a variety, is a highly lustrous, brittle crystal of wide colour range; hardness, 4. Varieties of fluorspar are sometimes termed, in the trade, " false" ruby, emerald, sapphire, and other well-known gem stones. GOLD-QUARTZ--in crystals, filiform, reticulated, and arborescent shapes--is commonly worn as a jewel. Gold penetrating white, black, rose, and amethystine quartz, is worked into jewelry of all sorts, sometimes of very elaborate designs. These uses of gold-quartz are most common on the Pacific coast and in western North American cities. HEMATITE, composed of iron 70, oxygen 30, is commonly cut into beads, charms, and intaglios. Chromic iron and ilmenite are similarly used. Although this iron ore is steel-grey, 9 o H V. I! r"-NiVM!r:: -; . A V-when polished, its streak, when scratched, is red; hence the name hematite, meaning "bloodstone." IOLITE, also called dichroite and water sapphire, is...Read Less
New. 345 pages. Reprinted from 1909 edition. NO changes have been made to the original text. Each page is checked manually before printing. Illustrations, Index, if any, are included in b/w. Fold-outs, if any, are not part of the book. It is not a set, only a single book/volume. This paperback book is SEWN perfect bound, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of paperback binding. It can also be open wide. The pages will not fall out and will be around for a lot longer than normal paperbacks. This book is printed on demand on acid-free paper. (Original publisher, New York and London, G. P. Purnam's sons)
New. 335 pages. Reprinted from 1909 edition. New 2013 edition in PAPERBACK is SEWN PERFECT BOUND, much more durable than a standard paperback. This is a quality reprint of an old book of historical value. If the original book was printed in multiple volumes than this reprint is of only a single volume. This is an exact/strict reproduction of text, no changes has been made in respect to the original text. A lot of effort has been made to check and improve each page/scan manually for its quality of text and illustrations (if any, are in b/w). Folded illustrations, if any, are not included in the book. This is not a retyped or an ocr'd book. Index, contents, etc, if any in the original book, are included. This item is printed on demand using good quality natural shade paper. The title of the book, on the cover, is in gold lettering.
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