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Author: Lance Grande Publisher: University of Chicago Press ISBN: 0226305112 Category : Design Languages : en Pages : 387
Book Description
"Gems and Gemstones" features nearly 300 color images of cut gems, precious and semiprecious stones, gem-quality mineral specimens, and fine jewelry to be unveiled in the new Grainger Hall of Gems at the Field Museum in Chicago.
Author: Lance Grande Publisher: University of Chicago Press ISBN: 0226305112 Category : Design Languages : en Pages : 387
Book Description
"Gems and Gemstones" features nearly 300 color images of cut gems, precious and semiprecious stones, gem-quality mineral specimens, and fine jewelry to be unveiled in the new Grainger Hall of Gems at the Field Museum in Chicago.
Author: Ra Bonewitz Publisher: DK Publishing (Dorling Kindersley) ISBN: 9780751344004 Category : Fossils Languages : en Pages : 0
Book Description
From glittering gemstones to fascinating minerals and fossils, this incredible reference book is a stunning celebration of the Earth s buried treasures. Specially commissioned photography captures the essence and beauty of over 450 superb specimens, while lively and informative text describes the characteristics of each and its unique and changing relationship to humankind through the ages. Organized by rock classes and chemical groups, each rock, mineral, and fossil entry contains a photograph of the specimen together with lively, wide-ranging text describing its qualities and history of use. In addition, a detailed, at-a-glance reference panel provides key data for identification and classification.
Author: John Farndon Publisher: Australian Geographic ISBN: 9781742459400 Category : Languages : en Pages :
Book Description
The definitive guide to rocks, minerals and gems, this title includes an introduction to rocks and minerals and how they form, and a quick guide to what you need and where to look. There is also a complete guide to identifying rocks and minerals and everything you need to know to start building a collection. Packed with fun facts and practical ......
Author: Oliver Cummings Farrington Publisher: Theclassics.Us ISBN: 9781230732220 Category : Languages : en Pages : 82
Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...the high refractive power and hence play of colors of the latter. The stones are sometimes called "Matura diamonds," because of their abundance at Matura in the island of Ceylon. The colorless, or smoky zircons, are often known as "jargons" or "jargoons," a name said to have been given in allusion to the fact that though they resembled the diamond in luster they had really much less value. Besides zircons of this sort there are those known in jewelry as "hyacinth" or "jacinth," which are transparent zircons of a brownish, red-orange color. A stone of a nearly similar color is furnished by the essonite variety of garnet, and this is also often known as hyacinth. The high specific gravity of zircon above referred to is more than four times the weight of water, determinations giving results varying between 4.2 and 4.86. Zircon is thus the heaviest of gems, and will sink at once in any of the ordinary heavy liquids. The hardness of zircon is between that of quartz and topaz, being 7 . Its index of refraction is high, being 1.92, or near to the diamond among gems, a fact which accounts for its brilliancy when cut. Before the blowpipe zircon is infusible. It is not acted upon by acids except in fine powder by sulphuric acid. In composition it is a silicate of zirconium, the percentages being silica 32.8, zirconia 67.2. It usually also contains a little iron oxide. It is not an uncommon mineral in rocks, occurring in crystals of microscopic size, and in crystalline rocks it sometimes occurs in large and abundant crystals. These are usually opaque and of no value for gem purposes, although they are mined to some extent at the present time for use in incandescent lights. Opaque zircon is found...
Author: Devin Dennie Publisher: Penguin ISBN: 1465494510 Category : Juvenile Nonfiction Languages : en Pages : 98
Book Description
A stunning visual reference book for little geologists who love to find fascinating rocks all around them. Identify colorful gemstones, sparkly crystals, the toughest rocks, and ancient fossils. Packed with fun facts, information, and extensive photos all about the rocks and minerals that make up the world around us. Interactive learning that engages young scholarly minds. Learn about 64 different types of rocks and minerals, how to tell the difference between them and where to find them. Dig into all the interesting geological materials from deep space to the deepest caves. You’ll even discover glow in the dark minerals and living gems! Find out about the stuff our world is made of, and how rocks and minerals form over time. This captivating book introduces children to hands-on science with fun activities like starting your own impressive rock collection and how to stay safe on your rock finding missions. Written for kids aged 6 to 9 with bite-sized information and explanations. The easy-to-understand language gives them a rock-solid foundation for science subjects. The geology book includes the phonetic pronunciation of the rock and mineral names so your little one will sound like a rock expert in no time. Rockin’ It With Stones And Minerals • Stunning high-quality photographs. • Inspiring activities for little Earth scientists. • Over 64 types of rocks, their properties, and how they are formed.
Author: Garret Romaine Publisher: Rowman & Littlefield ISBN: 149301482X Category : Nature Languages : en Pages : 177
Book Description
Rocks, Gems, and Minerals is a field guide to more than 100 of the most common and sought-after rocks, gems, and minerals hidden throughout North America. Conveniently sized to fit in your pocket and featuring full-color, detailed photographs, this informative guide makes it easy to identify rocks in your backyard and beyond. Also included is an introduction that covers fundamental geology information and interesting facts. This is the essential source when you're out in the field, both informative and beautiful to peruse.
Author: Kennie Lyman Publisher: Touchstone ISBN: 9780671604301 Category : Nature Languages : en Pages : 388
Book Description
Simon & Schuster's Guide to Gems and Precious Stones provides both the connoisseur and the casual collector with a compact, easy-to-use volume describing more than 100 rare varieties of minerals whose beauty and mystery have possessed our imaginations from time immemorial. More than 450 brilliant photographs accompany profiles of each gem, covering such aspects as appearance, physical properties -- density, hardness, refraction -- occurrence, and how to judge quality and value. Additional sections describe the process of cutting gemstones and the techniques professional gemologists use to evaluate a stone's weight and optical properties. Detailed and comprehensive, this book is essential for anyone interested in the study of gems and precious stones.
Author: Lance Grande
Author: Lance Grande
Author: Ra Bonewitz
Author: Julius Wodiska
Author: Oliver Cummings Farrington
Author: John Sinkankas
Author: John Farndon
Author: Oliver Cummings Farrington
Author: Devin Dennie
Author: Garret Romaine
Author: Kennie Lyman