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Post by RedRimmed Desert on Mar 27, 2015 15:30:45 GMT -6
Diamond display at the museum. The Uncle Sam diamond, it obviously must be a replica. link-Uncle Sam (diamond) From Wikipedia, the free encyclopedia"Uncle Sam is the nickname for the largest diamond ever discovered in the United States. It was found in 1924 in Murfreesboro, Arkansas at the Prairie Creek pipe mine, which later became known as the Crater of Diamonds State Park. The diamond was named "Uncle Sam" after the nickname of its finder, Wesley Oley Basham, a worker at the Arkansas Diamond Corporation. rough diamond as originally discovered weighed 40.23 carats (8.046 g). It was faceted twice by Schenck & Van Haelen of New York, a company which specialized in Arkansas diamonds, handling over 14,000."
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Post by RedRimmed Desert on Mar 27, 2015 16:05:45 GMT -6
The old USGS map shows an isolated area of lamproite in the west hill area (which is outside the mine field). If you look at where the red arrow points, this is the end of the southeast vein (or flow of lamproite magma, whatever you want to call it). Since a later geological survey found 2 additional diamond pipes, these were after erruptions on the northeast and southwest hill area. Following the dark blue line from the main pipe, the circle on the end of line is the spot the lamproite was identified in the past. The ground slopes in that direction, it would have been closer to the surface. The A line was already on this map, looks like it follows the boundary of the mine in the southwest section. The actual vein enters just south of where the blue line starts. The Google Earth satellite map shows the southwest section, the blue line goes to a circle, approximately the same spot as on the USGS map. The red line (map above) follows the vein location and starts at the dowsed location of Am-C1a flag (see map below). My first experience using a pair of L-rods, began on the dirt road close to the lamproite (the blue circle I put around). I got out my gps to check a map dowsed location. It turns out the coordinates were right about or possibly right on the blue circle which also has a red line leading to it (on the marked satellite map). I dug a few signals, put the dirt in a black plastic gold pan. This is when I'd found a couple very tiny crystalline ore specimens only 3/8" or 1/2" in size.
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Post by RedRimmed Desert on Mar 30, 2015 18:41:55 GMT -6
Looking through the same tailing pile, that was spread out near the trees (22 agates were collected there) found this black jasper which at first I'd wondered if it could be obsidian. Amethyst colored jasper has a light grayish surface but a deep purple inside. I also thought at first glance the stone really could be amethyst, the park geologist confirmed the find to be a type of jasper. The outside surface layer, of amethyst jasper is a grayish purple color. This specimen has the light surface on both sides without showing any of the center, as in the photo above. Interesting to note is the Am-C1a flag from map dowsing at home, is the area where the amethyst jasper stones can be found. The Am- prefix for my Google Earth pin I'd added because it is in the old mine field amethyst bed. Once the spot produced some nice amethyst finds, but has long since been worked out.
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Post by RedRimmed Desert on Apr 3, 2015 15:01:50 GMT -6
Tan jasper with a nice translucence. Tan mixed with other colored jasper, very interesting pattern (never seen anything like this before). Smaller but slightly mixed similar piece of tan stone.
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Post by RedRimmed Desert on Apr 3, 2015 17:26:24 GMT -6
I think this one was a little dark red mixed with a blackish red. A smaller but similar piece of dsrk reddish jasper. Last but not least, tan over black jasper stone.
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Post by manelsv on Aug 21, 2015 1:44:46 GMT -6
Tell me please what can be this stone?Rods consider it gold..?!
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Post by RedRimmed Desert on Aug 23, 2015 19:47:28 GMT -6
Hard to tell from only a photo. Is there white or rusty quartz in many of the stones?
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Post by RedRimmed Desert on Aug 25, 2015 17:45:08 GMT -6
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Post by RedRimmed Desert on Aug 25, 2015 17:47:14 GMT -6
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Post by manelsv on Aug 31, 2015 13:27:43 GMT -6
Thanks Red, Yes,has a rust color in the stone.
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