NATURAL URANIUM ROCK: COFFINITE $24.00 + $9.50 shipping Radiation: 29,000 cpm, measured with a standard pancake probe. Rock was found at Jurassic Canyon, September 2019. Weight: 2.0 oz. (small) One white dot on a side shows the surface location with the strongest radioactive response. Beware of "METER- NEEDLE-SLAM" especially with higher level uranium rocks! Many geigers top-out with highest measurable levels at 40,000 cpm or 50,000 cpm. This rock's response is near those two levels, so use caution ! I will enclose my half-page essay on "METER-NEEDLE-SLAM" to encourage cautious measurement with this particular rock! COFFINITE is a common mineral, found widely at many canyon locations, but this rock has lower activity than other Coffinite rocks I have found over the years. SHIPPING COST is always reduced if several items are purchased, to be shipped combined in the same package. Shipping must be to a mailing address within the USA. The Federal Nuclear Regulatory Agency does NOT allow any shipment of uranium rocks to any other country. SUGGESTION TO URANIUM ROCK HOUNDS: JOIN ME SOON TO COLLECT MORE ROCKS! The underground mines at Jurassic Canyon closed during the late 1980s, because nuclear power had become unpopular at that time. But today, nuclear power has restored its popularity among environmentalists, mainly because it has NO carbon content and it contributes nothing to global warming. The underground mining will resurrect, if/when the world price of uranium reaches $65.00 per lb. Currently (5-2024), that price is rising, and is approx. $92.00. The whole town of Grants NM is eager to see the return of local prosperity when the uranium mines are re-opened again! But uranium "rockhounds" should arrange with me soon, to join me for uranium rock-collecting; when the mines re-open, fences around them will keep "rockhounds" away from the best rock-collecting sites! It has now been two full years since I have been out there collecting rocks with visitors; join me now! My first 14 of 35 trips to Jurassic Canyon were done alone, but that is risky because the uranium field is inhabited by a few rattlesnakes; I fear that, if I collect rocks alone and get a snake bite, I might not be able to drive the car 22 miles to the hospital in Grants. I need a companion when collecting the rocks! On the last day of a 3-5 day outing, I divide the found rocks with the guest, 50-50 so we each get the same weight of found rocks, at the end. If any found rocks are radioactive dinosaur fossils, those too are shared 50-50. Arrange your rock-collecting visit! ALPHA RADIATION is the radiation type that is most easily blocked by barriers, even by clothing, paper, or the skin. Alpha radiation is the radiation type that is most commonly emitted by natural uranium. By contrast, Gamma ray radiation, is the "Macho" type of radiation. Gamma rays penetrate all barriers, even metals such as lead. Gamma rays make space travel difficult, because cosmic rays in outer space are mainly gamma radiation.Cosmic radiation at the ISS space station is 240 times more intense than natural surface radiation on Earth; At the surface of red planet Mars, the radiation is 730 times more intense than Earth's surface radiation. The Gamma Ray Burst of October 2022, a tightly focused narrow beam, traveled 2.4 billion light years to Earth; it was the most intense energy event since the early "Big Bang." That GRB interrupted low-frequency AM radio for four days. Learn more about Gamma Ray Bursts at YouTube! There are now about 80 teaching videos on GRBs at YouTube; this is one of the most amazing topics in all of astronomy. My P3 geiger probe has a large 3" pancake sensor made at Ukraine in the late 1980s for the USSR Soviet military; it is tuned to respond mainly to gamma rays; if aimed upward at the sky, it could detect distant GRB signals from other galaxies, such as the one that hit Earth in October 2022. Stephen Buggie, Ph.D. Professor Emeritus of Psychology Univ. of New Mexico, Gallup Gallup NM 87301-6979