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Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [citation needed] but it has also been mined in the Lower Silesia region of Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...
A lapidary is a text in verse or prose, often a whole book, that describes the physical properties and metaphysical virtues of precious and semi-precious stones, that is to say, a work on gemology. [1] It was frequently used as a medical textbook, since it also includes practical information about the supposed medical application of each stone ...
[13] [19] Practitioners of crystal healing purport that certain physical properties such as shape, color, and markings, determine the ailments that a stone can heal; lists of such links are published in commonly distributed texts. [19]
GIA also designs and manufactures professional equipment for grading, identifying, and selling diamonds and colored gemstones. These instruments are used to determine the physical and optical properties of gems and analyze their microscopic features. The first GIA instrument, a 10x eye loupe, was introduced in the early 1930s.
Articles related to Gemology and Jewelry should be tagged on the Talk page with {{WP Gemology and Jewelry}} For full details about using this talk page template see Template:WP Gemology and Jewelry .
In 2007, Christensen started making sand jewelry for family and friends, by 2010 she launched Dune Jewelry and served as its chief operating officer since. [2] Over the years, the company's Sandbank– the world's largest– had collected 5,000 samples from beaches, sports venues, trails, mountaintops, historical locations and iconic events from all over the globe.
Saw-cut and polish—Stones up to 1/2 kg are cut with diamond saws into thin slabs, which then are cut into various shapes. One side of the shaped slab is polished producing fine jewelry pieces and collectible gems called cabochons. (Note the value of large Lake Superior agates, which weigh a few pounds or more, will lose most of their value if ...
The Gnostics wore the stone as an amulet for longevity, for wealth and courage, to strengthen the stomach, and to dispel melancholy. [6] In the Middle Ages it was considered useful for animal husbandry. [6] The ancient Greeks and Romans wore the stone to bring renown and favor, to bring endurance, and as a charm against the bite of venomous ...
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