|14.2 carat octahedral diamond from |
Kelsey Lake, Colorado (photo
courtesy of Howard Coopersmith).
|Sloan kimberlite, Colorado. This kimberlite contains diamonds as well as|
other gemstones including Cape Ruby (pyrope garnet) and chromian diopside.
|A fairly inexpensive design for a grease table constructed by Jay Roberts at|
the Wyoming Geological Survey. The light-bluish white coating is the grease
mixture. The problem with this material (particularly on a university campus)
was that we had to buy Vaseline by the case. We often received accusing
expressions from drug store employees assuming we were with a fraternity
planning for some weekend orgy.
|A giant diamond from Africa - 620 carats in weight. This diamond was actually on display for a short time at Wiseman's|
Jewelry in Laramie, where I was able to photograph the extraordinary stone.
|The diamond detective - yep, that's me when I was VP of US Exploration for DiamonEx Ltd, Australia. During exploration|
in Colorado, Montana, Kansas and Wyoming, we identified hundreds of cryptovolcanic structures that look almost like
impact craters with the exception that these are structurally controlled - located on a fault or similar feature. Would you
like more information from the Gem Hunter? Follow me on Facebook and link to my GemHunter website.
|Prismatic quartz crystal from|
Hot Springs Arkansas
|Blue quartz from Montana|