This is a high-activity uraninite uranium specimen featuring a rugged quartz matrix with visible primary ore and subtle secondary alteration. The piece has a natural, earthy look with sparkling silica crystals and scattered green hints that tell the story of uranium beginning to oxidize and migrate. It’s not just a radioactive rock—it’s a snapshot of the uranium lifecycle in progress.
Clocking in at ~70,000 CPM, this specimen delivers serious performance in a mid-sized form. The combination of strong activity and mixed mineralization makes it especially appealing to collectors who want both visual geology and high detector response. It’s equally at home in a display case or in active use for instrument testing.
• Weight: 3.2 oz (91 g)
• Dimensions: approx. 2.36 × 1.89 × 1.07 in (6.0 × 4.8 × 2.7 cm)
• Locality: Likely Colorado Plateau / Western US uranium region
• Condition: Natural, unprocessed, no stabilization or enhancement
• Measured Activity: ~70,000 CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• Dose Rate: ~3.5 mR/hr (Ludlum Model 9 ion chamber)
• UV Response: Minimal to weak (possible faint response from secondary minerals)
• Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
• Location Blurb: Transitional uranium material like this is common in the Colorado Plateau, where primary ore is partially altered near the surface.
• Non-uranium minerals: Quartz, iron oxides, trace secondary uranium minerals
• Activity Level: Strong for size
• Best Use Cases: Detector testing, primary vs secondary comparison, centerpiece mid-tier specimen
• Who This Is Best For: Collectors wanting both high CPM and visible geological complexity
This is a high-activity uraninite uranium specimen featuring a rugged quartz matrix with visible primary ore and subtle secondary alteration. The piece has a natural, earthy look with sparkling silica crystals and scattered green hints that tell the story of uranium beginning to oxidize and migrate. It’s not just a radioactive rock—it’s a snapshot of the uranium lifecycle in progress.
Clocking in at ~70,000 CPM, this specimen delivers serious performance in a mid-sized form. The combination of strong activity and mixed mineralization makes it especially appealing to collectors who want both visual geology and high detector response. It’s equally at home in a display case or in active use for instrument testing.
• Weight: 3.2 oz (91 g)
• Dimensions: approx. 2.36 × 1.89 × 1.07 in (6.0 × 4.8 × 2.7 cm)
• Locality: Likely Colorado Plateau / Western US uranium region
• Condition: Natural, unprocessed, no stabilization or enhancement
• Measured Activity: ~70,000 CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• Dose Rate: ~3.5 mR/hr (Ludlum Model 9 ion chamber)
• UV Response: Minimal to weak (possible faint response from secondary minerals)
• Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
• Location Blurb: Transitional uranium material like this is common in the Colorado Plateau, where primary ore is partially altered near the surface.
• Non-uranium minerals: Quartz, iron oxides, trace secondary uranium minerals
• Activity Level: Strong for size
• Best Use Cases: Detector testing, primary vs secondary comparison, centerpiece mid-tier specimen
• Who This Is Best For: Collectors wanting both high CPM and visible geological complexity
