gemstones collins gem

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A handy guide identifying over 170 types of the world’s gemstones with beautiful colour photography taken from the Smithsonian Institution’s archives.

A handy guide identifying over 170 types of the world's gemstones with beautiful colour photography taken from the Smithsonian Institution's archives.

Describes the history and characteristics of the most common gemstones, explains the unique qualities of the gems, and looks at how they are mined, cut, and polished.

Shows and describes different kinds of rocks and minerals, and tells how to identify rocks by testing for hardness, streak color, and density

A guide to the major rocks, minerals and gemstones found in Europe. It contains an introduction to the basics of mineralogy, followed by a list of the general features of a rock that can be used in its identification. It also explains how to tell the basic difference between an igneous, metamorphic and sedimentary rock, allowing quick reference to the major identification sections for each of these classes. In these will be found comprehensive descriptions of each rock or mineral, with details of its composition, hardness, specific gravity, colour, fracture, cleavage, streak, lustre, transparency and crystal system, as well as notes on how it is formed and where it might be found, both in the UK and in the rest of the world.

Provides detailed information regarding the physical characteristics and unique traits of more than 1,800 precious and semiprecious stones, as well as discussing gemstone structure, production, name origin, and symbolism.

Focusing on the North American continent, this book, the first of its kind, identifies and describes major field guides in all scientific subject areas (from plants, animals, and insects to astronomy and weather, geology and fossils, and man-made objects). Organized by topic, it offers complete bibliographic information and descriptions of more than 1,300 field guides.

Describes and identifies a variety of precious stones and minerals found in Colorado.

As entertaining as it is incisive, Stoned is a raucous journey through the history of human desire for what is rare, and therefore precious. What makes a stone a jewel? What makes a jewel priceless? And why do we covet beautiful things? In this brilliant account of how eight jewels shaped the course of history, jeweler and scientist Aja Raden tells an original and often startling story about our unshakeable addiction to beauty and the darker side of human desire. What moves the world is what moves each of us: desire. Jewelry—which has long served as a stand-in for wealth and power, glamor and success—has birthed cultural movements, launched political dynasties, and started wars. Masterfully weaving together pop science and history, Stoned breaks history into three categories—Want, Take, and Have—and explains what the diamond on your finger has to do with the GI Bill, why green-tinted jewelry has been exalted by so many cultures, why the glass beads that bought Manhattan for the Dutch were initially considered a fair trade, and how the French Revolution started over a coveted necklace. Studded with lively personalities and fascinating details, Stoned tells the remarkable story of our abiding desire for the rare and extraordinary.

This colour edition of the Collins Gem Dictionary and Thesaurus is an indispensable guide to the English language. Part of the Collins Gem range - the world's best-selling little dictionaries - it provides dictionary definitions and thesaurus synonyms on the same page for incomparable quick and easy reference.Collins colour Dictionary and Thesaurus provides the most up-to-date words, clear definitions and accessible same-page dictionary and thesaurus texts - all in the handy and portable Gem format. In addition to the wide range of definitions and synonyms, the Gem Dictionary and Thesaurus has a handy and practical supplement. With its clear colour layout and matching dictionary and thesaurus entries on the same page, you can be confident that the Collins Gem English Dictionary & Thesaurus will help you find all the latest words you need - and fast!

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