Gem Stone Faceted Bead

The paragon of physical perfection and a sparkling example of Earth's forces at work, the diamond has fascinated all realms of society, from starlets to scientists. The Nature of Diamonds is a comprehensive look at nature's most coveted gem. A handsome, large-format book, The Nature of Diamonds is an authoritative and richly-illustrated tribute to the diamond. Leading geologists, gemologists, physicists, and cultural observers cover every facet of the stone, from its formation in the depths of the Earth, its ascent to the surface, and its economic, regal, social, and technological roles. Cutting-edge research takes the reader to the frontiers of diamond exploration and exploitation, from the Arctic wastes to the laboratories where diamonds are created for massive road shredders that rip up and then re-create superhighways. Here also is an overview of cutting, from the rough stones in Roman rings to the highly-faceted stones we see today, and a glimpse into the business of diamonds. Finally, The Nature of Diamonds chronicles scientific and cultural history and explores the diamond as both a sacred and a social symbol, including a picture history of betrothal rings. Wide-ranging illustrations explain the geology of diamonds, chart the history of mining from its origins in India and Brazil through the diamond rush in South Africa and today's high-tech enterprises, and capture the brilliance and beauty of this extraordinary gem.

More than 1,400 specimens. Discover what gems are, how they are classified and named, their physical properties, and how they are cut and polished. "Invaluable to rockhounds of all ages."--"Science Teacher. "One of the 100 outstanding Sci-Tech books of the year."--"Library Journal. "Anyone interested in minerals and gems will want a copy of this beautifully-illustrated book."--"Science Books & Films. "The excellent index takes you right to any stone."--"Bead & Button.

Artificial gem - Artificial gems are not imitations of real gems, but the actual formation by artificial means of the real precious stone, so that the product is identical, chemically, physically and optically, with the one found in nature. For instance, in chemical composition the lustrous diamond is nothing but crystallized carbon.

Gemma Augustea - The Gemma Augustea (or Gem of Augustus) is a low-relief cameo gem cut from a double-layered Arabian onyx stone. It is commonly agreed that the gem cutter who created the Gemma Augustea was either Dioscurides or one of his disciples, around A.

Pleochroism - Pleochroism is an optical phenomenon where due to double refraction of light by a colored gem or crystal, the light is divided into two paths which are polarized at a 90Â° angle to each other. As the divided light follows different paths within the stone and are traveling at different speeds, they may have the result of differential selective absorption, thus when they leave the crystal they have different colors, making the stone seem to be of different colors.

John Stone Stone - John Stone Stone (September 24, 1869 â€“ May 20, 1943) was a physicist and inventor. He labored as an telephone engineer and help develop the field of wireless in it's early days.

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Natural Gem Stone Bead - Natural Gem Stone Bead Red Coral Necklace & Bracelet Set (Peru) Elegant natural gem stone bead and tastefully exotic, this silver coral set will make the perfect Valentine's Day gift. This multi-bead necklace combines a red coral shaped heart natural gem stone bead and beads with Peruvian silver alpaca beads of varying shapes natural gem stone bead and sizes; the set also boasts a matching bracelet. According to ancient cultures, each stone has a distinct vibration frequency that affects the ...

Natural Gem Stone Bead - Natural Gem Stone Bead Technibond; Diamond-Accented Triangular Turquoise Ring Do you make it a point to stand out in a crowd? Try a new spin on a familiar stone with this diamond-accented, genuine turquoise Technibond ring. Bezel-set in the center of this bold ring is a triangular, stabilized turquoise (approx. 15mm). Unlike traditional cabochons, this gem has three "facets" that form a pyramid-like point on top. Round diamond accents glint from rhodium-plated beading, which elegantly frames ...