This is a compact but very active Gateway specimen with excellent yellow uranium mineralization spread across dark ore surfaces. The black to gray areas are consistent with vanadium-rich mineralized sandstone, while the bright yellow coatings and tiny starburst sprays are the collectible uranium-vanadium minerals that make Colorado Plateau material so recognizable.
At only 0.8 oz and approximately 2.18 inches long, this piece measuring ~50,000 CPM is exceptionally active for its size. It is a strong “small but hot” specimen, ideal for collectors who want visible uranium mineralization, a classic Gateway locality, and high activity without needing a large cabinet-size rock.
SPECIFICATIONS
• Weight: 0 lb 0.8 oz, 22.7 g
• Dimensions: approx. 2.18 × 1.22 × 0.50 in, 5.5 × 3.1 × 1.3 cm
• Locality: Gateway, Colorado, USA
• Condition: Natural, unprocessed, no stabilization or enhancement
RADIATION INFORMATION
• Measured Activity: ~50,000 CPM
• Instrument: Pancake Geiger probe
• UV Response: Not tested / not noted
• Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
COLLECTOR NOTES
• Gateway, Colorado is part of the historic Colorado Plateau uranium-vanadium region, known for sandstone-hosted uranium ore and bright yellow secondary uranium minerals.
• Identified minerals: likely tyuyamunite/carnotite with dark vanadium-rich uranium ore staining.
• Non-uranium minerals: sandstone matrix, quartz grains, probable vanadium oxides/clays, and iron oxide staining.
• Activity relative to size: Extreme — approximately 60K CPM from a 0.8 oz specimen is very strong.
• Best use case examples: high-activity comparison specimen, educational uranium-vanadium ore example, compact radioactive display piece, element collection specimen.
• Best for: radioactive mineral collectors, element collectors, Colorado Plateau locality collectors, and buyers looking for a small specimen with premium activity.
This is a compact but very active Gateway specimen with excellent yellow uranium mineralization spread across dark ore surfaces. The black to gray areas are consistent with vanadium-rich mineralized sandstone, while the bright yellow coatings and tiny starburst sprays are the collectible uranium-vanadium minerals that make Colorado Plateau material so recognizable.
At only 0.8 oz and approximately 2.18 inches long, this piece measuring ~50,000 CPM is exceptionally active for its size. It is a strong “small but hot” specimen, ideal for collectors who want visible uranium mineralization, a classic Gateway locality, and high activity without needing a large cabinet-size rock.
SPECIFICATIONS
• Weight: 0 lb 0.8 oz, 22.7 g
• Dimensions: approx. 2.18 × 1.22 × 0.50 in, 5.5 × 3.1 × 1.3 cm
• Locality: Gateway, Colorado, USA
• Condition: Natural, unprocessed, no stabilization or enhancement
RADIATION INFORMATION
• Measured Activity: ~50,000 CPM
• Instrument: Pancake Geiger probe
• UV Response: Not tested / not noted
• Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
COLLECTOR NOTES
• Gateway, Colorado is part of the historic Colorado Plateau uranium-vanadium region, known for sandstone-hosted uranium ore and bright yellow secondary uranium minerals.
• Identified minerals: likely tyuyamunite/carnotite with dark vanadium-rich uranium ore staining.
• Non-uranium minerals: sandstone matrix, quartz grains, probable vanadium oxides/clays, and iron oxide staining.
• Activity relative to size: Extreme — approximately 60K CPM from a 0.8 oz specimen is very strong.
• Best use case examples: high-activity comparison specimen, educational uranium-vanadium ore example, compact radioactive display piece, element collection specimen.
• Best for: radioactive mineral collectors, element collectors, Colorado Plateau locality collectors, and buyers looking for a small specimen with premium activity.
