These are bright yellow, high-quality carnotite-bearing uranium ore samples from near Gateway, Colorado. Each piece is randomly selected from natural uranium-vanadium material and measured on a Ludlum Model 3 with 44-9 pancake probe.
Gateway-area carnotite is classic Colorado Plateau material, known for vivid yellow uranium-vanadium mineralization on sandstone or mixed ore matrix. These specimens are excellent for radioactive mineral collectors, element collectors, Geiger counter demonstrations, classroom comparison sets, and anyone wanting a natural uranium-bearing ore specimen with a clearly measured activity range.
FOUR ACTIVITY LEVELS AVAILABLE
• Under 10K CPM: entry-level radioactive mineral sample with a clear Geiger counter response
• 10K–19K CPM: mild to moderate activity, excellent for beginner collectors
• 20K–29K CPM: stronger medium-activity sample with a more noticeable instrument response
• 30K–39K CPM: high-activity random sample and the strongest standard tier before individually listed specimens
Each order includes one randomly selected rock sample from the activity level chosen. Photos are a general representation only. Exact size, shape, color, mineral coverage, and appearance will vary.
SPECIFICATIONS
• Weight: Varies by individual sample
• Dimensions: Varies by individual sample
• Locality: Near Gateway, Colorado, USA
• Condition: Natural, unprocessed, no stabilization or enhancement
RADIATION INFORMATION
• Measured Activity: Selectable activity level: <10K, 10K–19K, 20K–29K, or 30K–39K CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• UV Response: Not tested / varies by sample
• 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 carnotite ore.
• Identified minerals: carnotite and associated uranium-vanadium mineralization.
• Non-uranium minerals: sandstone matrix, quartz grains, vanadium minerals, iron oxides, and associated host-rock material may be present.
• Activity relative to size: ranges from mild to strong depending on the selected activity level.
• Best use case examples: Geiger counter demonstration, uranium-vanadium ore comparison specimen, educational radioactive mineral sample, beginner collector piece, or element collection specimen.
• Best for: radioactive mineral collectors, element collectors, educators, Geiger counter owners, and collectors wanting bright yellow Gateway-area carnotite with a selectable activity range.
These are bright yellow, high-quality carnotite-bearing uranium ore samples from near Gateway, Colorado. Each piece is randomly selected from natural uranium-vanadium material and measured on a Ludlum Model 3 with 44-9 pancake probe.
Gateway-area carnotite is classic Colorado Plateau material, known for vivid yellow uranium-vanadium mineralization on sandstone or mixed ore matrix. These specimens are excellent for radioactive mineral collectors, element collectors, Geiger counter demonstrations, classroom comparison sets, and anyone wanting a natural uranium-bearing ore specimen with a clearly measured activity range.
FOUR ACTIVITY LEVELS AVAILABLE
• Under 10K CPM: entry-level radioactive mineral sample with a clear Geiger counter response
• 10K–19K CPM: mild to moderate activity, excellent for beginner collectors
• 20K–29K CPM: stronger medium-activity sample with a more noticeable instrument response
• 30K–39K CPM: high-activity random sample and the strongest standard tier before individually listed specimens
Each order includes one randomly selected rock sample from the activity level chosen. Photos are a general representation only. Exact size, shape, color, mineral coverage, and appearance will vary.
SPECIFICATIONS
• Weight: Varies by individual sample
• Dimensions: Varies by individual sample
• Locality: Near Gateway, Colorado, USA
• Condition: Natural, unprocessed, no stabilization or enhancement
RADIATION INFORMATION
• Measured Activity: Selectable activity level: <10K, 10K–19K, 20K–29K, or 30K–39K CPM
• Instrument: Ludlum Model 3 with 44-9 pancake probe
• UV Response: Not tested / varies by sample
• 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 carnotite ore.
• Identified minerals: carnotite and associated uranium-vanadium mineralization.
• Non-uranium minerals: sandstone matrix, quartz grains, vanadium minerals, iron oxides, and associated host-rock material may be present.
• Activity relative to size: ranges from mild to strong depending on the selected activity level.
• Best use case examples: Geiger counter demonstration, uranium-vanadium ore comparison specimen, educational radioactive mineral sample, beginner collector piece, or element collection specimen.
• Best for: radioactive mineral collectors, element collectors, educators, Geiger counter owners, and collectors wanting bright yellow Gateway-area carnotite with a selectable activity range.
