Table of Contents
Where in the US can you find kimberlite?
They occur in the western margin of the Appalachians from New York to Tennessee; in the central region of the U.S. including Kentucky, southern Illinois, Missouri, Kansas and Arkansas, and in the Western States of Montana, Colorado, Wyoming and the Colorado Plateau.
Where can you find kimberlite diamonds?
Major diamond mines can be found in South Africa, Botswana, Angola, Russia, Canada and Australia, so starting there is a good bet.
Is kimberlite found in Minnesota?
Minnesota has: 1) that underlies two thirds of Minnesota; diamondiferous kimberlites have been found elsewhere within the Superior Craton in Ontario and Michigan (Fig. 2).
How do you identify a kimberlite diamond?
Finding large concentrations of G10 garnet can be a good indication of a diamondiferous kimberlite. On the Mohs hardness scale, garnet has a hardness of 8, compared with diamonds, which have a hardness of 10.
What precious stones can be found in Minnesota?
Minnesota is noted for its Lake Superior agate gemstones; however, it doesn’t have an officially designated state mineral. However, minerals such as thomsonite, jasper, quartz, or gold can be found throughout the state.
Where are diamonds found in Minnesota?
Major crustal structures that cross-cut Minnesota’s cratonic root, e.g., Vermilion Fault Zone, Great Lakes Tectonic Zone, Quetico Fault, etc., which are excellent kimberlite exploration areas (Fig.
Are diamonds found in Minnesota?
Minnesota has: An Archean-aged Superior Craton root (Fig. 1) that underlies two thirds of Minnesota; diamondiferous kimberlites have been found elsewhere within the Superior Craton in Ontario and Michigan (Fig. 2).
Are there gemstones in Minnesota?
Where is kimberlite found in Minnesota?
Minnesota has: Major crustal structures that cross-cut Minnesota’s cratonic root, e.g., Vermilion Fault Zone, Great Lakes Tectonic Zone, Quetico Fault, etc., which are excellent kimberlite exploration areas (Fig. 3).
How do I know if I have kimberlite?
kimberlite, also called blue ground, a dark-coloured, heavy, often altered and brecciated (fragmented), intrusive igneous rock that contains diamonds in its rock matrix. It has a porphyritic texture, with large, often rounded crystals (phenocrysts) surrounded by a fine-grained matrix (groundmass).
What rocks are worth money in Minnesota?
Semi-precious Gemstones of Minnesota
- The Lake Superior Agate is the state gemstone of Minnesota.
- Thomsonite is a zeolite mineral from the North Shore of Lake Superior.
- Silkstone is a chatoyant iron-rich jasper similar to Tigereye.
- Binghamite is a chatoyant jasper with fibrous inclusions.
What kind of gems are found in Minnesota?