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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 ...
"Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. More gem-quality sapphires are produced in Montana than anywhere else in North America. Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Finds in ...
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide
The name is a portmanteau, formed from Mo (Missouri), zark , and ite (meaning rock). Mozarkite consists essentially of silica ( quartz - SiO 2 ) with varying amounts of chalcedony . It has won distinction as a particular form or variety of chert because of its unique variation of colors and its ability to take a high polish.
Three Creeks Conservation Area is a nature preserve in Boone County, Missouri. Its Ozark terrain has many karst features including caves, springs, and sinkholes. It is located south of Columbia, Missouri and the more well-known Rock Bridge Memorial State Park .
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The Viburnum Trend is the only subdistrict mined for lead in the Southeast Missouri Lead District in modern day. Six lead mines are currently operational in 2022: the Brushy Creek, Buick, Casteel, Fletcher, and Sweetwater mines. [3] Today, many of the mines and mills of the Old Lead Belt have been abandoned or repurposed.
There is an oversized outdoor Checkerboard. A 9-hole miniature golf course is available and gemstone sluicing is popular, as well as two nature trails that lead to a 100' lookout tower that offers a panoramic view of the Ozark countryside. The Rock and Gift Shop offers a wide variety of gemstones, fossils, and gift items.