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2. Mount Ida, Arkansas - Wikipedia

   en.wikipedia.org/wiki/Mount_Ida,_Arkansas

   Mount Ida, Arkansas. Mount Ida is a city in and the county seat of Montgomery County, Arkansas, United States. Founded in 1842, the city saw a silver boom in the 1880s bring early prosperity and economic development to the area. Today, the economy is largely ranching, poultry farming, silviculture, and tourism around Lake Ouachita.

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

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

   ^ Florida's state gem, moonstone, was adopted to highlight Florida's role in the United States' Lunar program, which landed the first astronauts on the Moon. [81] ^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In ...

4. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

5. Ouachita Mountains - Wikipedia

   en.wikipedia.org/wiki/Ouachita_Mountains

   The Crystal Mountains are located primarily in Montgomery County, Arkansas. They are so named because of the occurrence of some of the world's finest quartz . The Crystal Mountains are generally taller than the nearby Zig Zag Mountains, achieving elevations over 1,800 feet (550 m).

6. Crater of Diamonds State Park - Wikipedia

   en.wikipedia.org/wiki/Crater_of_Diamonds_State_Park

   Website. Crater of Diamonds State Park. Crater of Diamonds State Park is a 911-acre (369 ha) Arkansas state park in Pike County, Arkansas, in the United States. The park features a 37.5-acre (15.2-hectare) plowed field, one of the few diamond -bearing sites accessible to the public. Diamonds have been discovered in the field continuously since ...

7. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...