Gemstones of the World

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The birthstone can be the main stone of the ring, or multiple birthstones can be mounted beside or around the diamond. You can personalize your engagement ring to the month of your birth and in your own unique style. Mother's Birthstone Ring: A Mother's Ring displaying a lab-grown birthstone for each of her children. Birthstone Jewelry Popularity Although many birthstone gems are affordable, some, such as diamond, emerald, and ruby, can be expensive. Decades ago, many jewelry manufacturers began using lab-grown and imitation gems in some commercial birthstone jewelry. A shopper is looking for a gift for a niece and is having difficulty finding "the perfect item". The salesperson asks the birthdate of the niece. Upon learning that the niece was born in February, the salesperson shows the shopper to a nice display of amethyst jewelry.

Guides for the Jewelry, Precious Metals, and Pewter Industries: Adoption of Revised Guides, published by the Federal Trade Commission in the Federal Register, August 16, 2018.Wearing and gifting birthstone jewelry is a long-standing custom in many countries. In the United States alone, consumers buy millions of dollars' worth of birthstone jewelry every month. Fair to Poor: Gems rated less than good have some defecit that makes them vulnerable to breakage or abrasion. Emerald (May), opal (October), peridot (August), and zircon (December)

Following the spectacular success of the first four editions of Gemstones of the World, the revised fifth edition exhibits important updates and a beautiful new cover. All the gemstones ever discovered are treated here in their many variations. More than 1,500 full-color photos showcase each precious and semiprecious stone in both its rough natural state and its polished and cut renditions. Each entry offers complete information on a stone's formation and structure; physical properties and characteristics; and methods of working, cutting, and polishing. Access-restricted-item true Addeddate 2022-01-04 10:09:10 Associated-names Shea, Daniel; Shea, Nicole, 1976- Autocrop_version 0.0.5_books-20210916-0.1 Boxid IA40315210 Camera Sony Alpha-A6300 (Control) Collection_set printdisabled External-identifier The first jewelry item that many children receive is often a birthstone ring, earrings, or pendant. Three-piece sets that include a birthstone ring, pendant, and pair of earrings are sold in many stores. These sets are popular birthday and graduation gifts. Some students select their birthstone as the center stone of their high school or college class ring.Excellent: The most durable birthstones are diamond (April), ruby (July), and sapphire (September). All of these gems have hardness of 9 or 10, excellent durability, and are suitable for any use in jewelry.

Red beryl is an extremely rare variety of beryl that has only been found in Utah and New Mexico. It was first discovered byMaynard Bixby in 1904. Despite being found in two locales, gem-quality red beryl has only been mined in Utah. Coined by some as the red emerald, this rare gem is very difficult to find due to the unique conditions required for this stone to form. Red beryl is not a variety of emerald but rather an entirely different gemstone with its own classifications. Ruby is the birthstone for the month of July and the world's most popular red gem. Rubies range in color from orangy-red, to red, to slightly purplish-red. The most desirable and valuable colors are pure red and slightly purplish red. Natural rubies have historically been expensive gems, but recent discoveries in Africa bring many attractive natural rubies into the market at affordable prices. urn:lcp:gemstonesofworld0000schu_b3o8:epub:899cfe24-e02a-4f80-aa7a-44aeec62e69d Foldoutcount 0 Identifier gemstonesofworld0000schu_b3o8 Identifier-ark ark:/13960/s2pww0z5kr1 Invoice 1652 Isbn 0806930888 Lccn 77079503 //r83 Ocr tesseract 5.0.0-1-g862e Ocr_detected_lang en Ocr_detected_lang_conf 1.0000 Ocr_detected_script Latin Ocr_detected_script_conf 0.9757 Ocr_module_version 0.0.14 Ocr_parameters -l eng+deu Old_pallet IA14624 Openlibrary_editionThe text begins with a brief mineralogical and gemological study, focusing on such topics as basic crystallography and crystal systems, hardness, refractive index, and other pertinent features of gem materials. Schumann largely focuses on minerals but does give proper descriptions of organic and synthetic materials as well. These first few sections serve as an excellent introduction to, or refresher on, many of the basic concepts that help make identification easier. The text is easily comprehensible to those at least somewhat familiar with the science of gemology, and it does a reasonably good job explaining the concepts for a novice. For someone completely new to the science, the jargon may be difficult, although Schumann attempts to bypass this issue by providing a brief list at the beginning of the book of terminology that may be unfamiliar. urn:lcp:gemstonesofworld0000schu_ed04:epub:9f9c4d71-0fce-4dbe-ab91-9c12969d87c4 Foldoutcount 0 Identifier gemstonesofworld0000schu_ed04 Identifier-ark ark:/13960/s2943jg8knf Invoice 1652 Isbn 9781402768293 Schumann devotes the most space, logically, to the most well-known and economically significant gemstones, such as diamond, sapphire, ruby, and emerald. Lesser-known and rare gems are not neglected, however, and he has compiled a fairly exhaustive list of gemstones, complete with color, hardness, density, refractive index, crystal system, and chemical composition. The book begins with descriptions of gemstone identification properties. Moh’s scale of hardness, basic mineral chemistry, specific gravity, cleavage and fracture, refraction and absorption, pleochroism, and fluorescence are described in sections followed by charts of these properties for selected gemstones. Later, these concepts are referenced and quantified in specific descriptions for each gemstone. Short, useful sections on mining, polishing, and faceting follow. Ocr tesseract 5.0.0-1-g862e Ocr_detected_lang en Ocr_detected_lang_conf 1.0000 Ocr_detected_script Latin Ocr_detected_script_conf 0.9909 Ocr_module_version 0.0.14 Ocr_parameters -l eng Old_pallet IA-NS-1200238 Openlibrary_edition