This is a compact but powerful uraninite-bearing uranium specimen with a rugged quartz matrix and visible primary ore exposure. The dark, dense uraninite contrasts beautifully against the sparkling silica background, giving the piece a gritty, industrial look that appeals to collectors who prefer true ore over flashy coatings. The faint green hints add just enough character to show early-stage alteration without overshadowing the primary mineralization.
Running ~45,000 CPM, this piece punches well above its size class. It’s an ideal “working specimen” — perfect for detector response demonstrations, side-by-side comparisons, or as a reliable mid-to-high activity piece in a serious collection. Small footprint, real ore, strong output.
• Weight: 1.6 oz (45 g)
• Dimensions: approx. 2.1 × 1.64 × 1.08 in (5.3 × 4.2 × 2.7 cm)
• Locality: Colorado Plateau
• Condition: Natural, unprocessed, no stabilization or enhancement
• Measured Activity: ~45,000 CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• Dose Rate: ~2.5 mR/hr (Ludlum Model 9 ion chamber)
• UV Response: None
• 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: Quartz-hosted uraninite like this forms in hydrothermal and sedimentary uranium systems, commonly found throughout the Colorado Plateau.
• Non-uranium minerals: Quartz/silica matrix, iron oxides, minor secondary uranium minerals
• Activity Level: Moderate–Strong for size
• Best Use Cases: Detector testing, primary vs secondary comparison, compact high-output specimen
• Who This Is Best For: Collectors wanting visible uraninite in a manageable, display-friendly size
This is a compact but powerful uraninite-bearing uranium specimen with a rugged quartz matrix and visible primary ore exposure. The dark, dense uraninite contrasts beautifully against the sparkling silica background, giving the piece a gritty, industrial look that appeals to collectors who prefer true ore over flashy coatings. The faint green hints add just enough character to show early-stage alteration without overshadowing the primary mineralization.
Running ~45,000 CPM, this piece punches well above its size class. It’s an ideal “working specimen” — perfect for detector response demonstrations, side-by-side comparisons, or as a reliable mid-to-high activity piece in a serious collection. Small footprint, real ore, strong output.
• Weight: 1.6 oz (45 g)
• Dimensions: approx. 2.1 × 1.64 × 1.08 in (5.3 × 4.2 × 2.7 cm)
• Locality: Colorado Plateau
• Condition: Natural, unprocessed, no stabilization or enhancement
• Measured Activity: ~45,000 CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• Dose Rate: ~2.5 mR/hr (Ludlum Model 9 ion chamber)
• UV Response: None
• 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: Quartz-hosted uraninite like this forms in hydrothermal and sedimentary uranium systems, commonly found throughout the Colorado Plateau.
• Non-uranium minerals: Quartz/silica matrix, iron oxides, minor secondary uranium minerals
• Activity Level: Moderate–Strong for size
• Best Use Cases: Detector testing, primary vs secondary comparison, compact high-output specimen
• Who This Is Best For: Collectors wanting visible uraninite in a manageable, display-friendly size
