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These diamonds have numerous industrial and commercial uses including cutting tools, thermal conductors and consumer diamond gemstones. Gemstone diamond producers [ edit ]
This is a list of gemstones, organized by species and types. Minerals. There are over 300 types of minerals that have been used as gemstones. Such as: A–B
Gem Testing Laboratory, Jaipur: This is a coloured gemstone centre in Jaipur. It grades and certifies all kinds of stones, its speciality is in coloured gemstones. Indian Gemological Institute, New Delhi: The Institute is located in New Delhi, IGI serves the gem testing and certification requirements of the industry in North India. [20] [21]
In creating jewellery, gemstones, coins, or other precious items are often used, and they are typically set into precious metals. Platinum alloys range from 900 (90% pure) to 950 (95% pure). The silver used in jewellery is usually sterling silver , or 92.5% fine silver.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
Pages in category "Jewelry retailers of the United States" The following 47 pages are in this category, out of 47 total. This list may not reflect recent changes. A.
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