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Tag: kimberlite

Kimberlite and Lamproite – Host Rocks for Diamond

Chuck Norris’s cousin, Vic, digs for hidden kimberlite under grassy vegetationanomaly discovered by the Gem Hunter in the Iron Mountain kimberlitedistrict in Wyoming. Kimberlite is very difficult to recognize. It is basically a potassic peridotite and comes in a variety of colors and textures. Most notable is green kimberlite due to abundant serpentinized olivine. It

How to Identify Diamonds in Nature

14.2 carat octahedral diamond from Kelsey Lake, Colorado (photo courtesy of Howard Coopersmith). In addition to the type of diamond we see at weddings, other varieties of extremely hard natural carbon are known including carbonado (polycrystalline) and lonsdaleite (hexagonal). These are all forms of carbon, as is graphite. But carbonado and lonsdaleite are very rare

DIAMONDS, DIAMONDS & MORE DIAMONDS

I love searching for diamonds. My first chance to explore for diamonds deposits occurred in 1977 when I was hired by Dr. Dan Miller of the WGS to appraise the newly discovered district south of Laramie. I ended up mapping the State Line district, found 9 diamond-bearing kimberlites my first 2 years & later mapped

CAPE RUBIES, CAPE EMERALDS, GARNETS

Diamonds were discovered in Wyoming & Colorado in 1975 by Mac McCallum, Chuck Mabarak & the USGS. This lead to some exploration for diamonds. Associated with diamonds are a host of extremely rare mantle nodules & gemstones known as Cape Ruby (pyrope garnet), Cape Emerald (chromian diopside & enstatite) that are always overlooked by mining