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2. Gemological Institute of America - Wikipedia

   en.wikipedia.org/wiki/Gemological_Institute_of...

   The Gemological Institute of America ( GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [ 1] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.

3. Jewelry District (Los Angeles) - Wikipedia

   en.wikipedia.org/wiki/Jewelry_District_(Los_Angeles)

   History. The Jewelry District is predominantly made up of early twentieth-century buildings, when the number of registered vehicles in the county grew from 160,000 to 842,000 in a span of 10 years. Half of the area falls under the greater "Historic Core" of Downtown Los Angeles, which spans between Hill and Main Streets, and 3rd and 9th streets.

4. List of U.S. state minerals, rocks, stones and gemstones

   en.wikipedia.org/wiki/List_of_U.S._state...

   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 ...

5. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...

6. 'Antiques Roadshow': diamond and ruby jewelry worth a fortune

   www.aol.com/news/2014-08-12-antiques-roadshow...

   Well, today, that 3-piece set is valued between $400,000-$450,000. According to The Daily Mail, rubies are the most expensive gems per carat on earth! To get your hands on some rubies and/or ...

7. California State Mining and Mineral Museum - Wikipedia

   en.wikipedia.org/wiki/California_State_Mining...

   Established. 1999. Governing body. California Department of Parks and Recreation. The California State Mining and Mineral Museum is a museum of the state park system of California, United States. The museum exhibits and interprets the state's mineral resources and mining heritage. It is located in Mariposa, a city in central California, on the ...