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This list of bullion dealers includes notable companies and organizations that deal in precious metals, such as gold and silver. This list is incomplete ; you can help by adding missing items . ( September 2014 )
Polished slab of bowenite serpentine, a variety of antigorite.. Bowenite is a hard, compact variety of the serpentinite species antigorite (Mg 3 (OH)O 4 Si 2 O 5). [1] Classed as a semi-precious gemstone, [2] it has been used for tools, weapons and jewellery by the Māori in New Zealand, [3] [4] and for jewellery by Fabergé. [5]
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.
Lapis lazuli (UK: / ˌ l æ p ɪ s ˈ l æ z (j) ʊ l i, ˈ l æ ʒ ʊ-,-ˌ l i /; US: / ˈ l æ z (j) ə l i, ˈ l æ ʒ ə-,-ˌ l i /), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.
Applied Jewelry Professional (AJP) GIA also exists to educate the gem and jewelry industry and the general public through its publications and outreach efforts. Most notable of these efforts is the quarterly publication of the magazine Gems & Gemology, a respected journal in the field. The journal includes full-length feature articles, as well ...
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 ...