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2. 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 ...

3. List of Indiana state parks - Wikipedia

   en.wikipedia.org/wiki/List_of_Indiana_state_parks

   In addition, a separate state agency operates White River State Park in downtown Indianapolis. [2] Marion and Clark are the only counties to have two parks. Brown County, the largest state park, has the greatest number of visitors, followed by Indiana Dunes State Park. [1] Richard Lieber was instrumental in the foundation of the Indiana State ...

4. 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.

5. 5 hidden gems to visit in Indiana's Hoosier National ... - AOL

   www.aol.com/5-hidden-gems-visit-indianas...

   Initial Point, the first marked point of Indiana's land survey from 1805, remains a historical marker in the Hoosier National Forest near Youngs Creek. Location: Off State Road 37, south of Paoli ...

6. Opal - Wikipedia

   en.wikipedia.org/wiki/Opal

   However, the argument for the Sanskrit origin is strong. The term first appears in Roman references around 250 BC, at a time when the opal was valued above all other gems. The opals were supplied by traders from the Bosporus, who claimed the gems were being supplied from India. Before this, the stone was referred to by a variety of names, but ...

7. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...