Radioactive Gems

The gems listed below are radioactive to some degree. Below the gem name is the relative degree of radioactivity (Barely Detectable, Mild, Weak, Strong, Very Strong) and the main element that is responsible for radioactivity in the gem and the percentage of the radioactive element present in the mineral. More information below.

Barely: (K) 14.05%

Weak: (Ce) 27.50%

Barely: (K) 2.28%

Barely: (K) 2.24%

Weak: (Ce) 27.35%

Barely: (K) 8.24%

Barely: (K) 9.44%

Barely: (K) 14.05%

Barely: (K) 4.37%

Barely: (K) 1.92%

Barely: (K) 6.07%

Very Strong: (U) 48.27%

Barely: (K) 2.78%

Barely: (K) 1.55%

Weak: (Ce) 63.94%

Very Strong: (U) 17.20%

Barely: (K) 0.36%

Mild: (Ce) 5.95%

Barely: (K) 6.22%

Barely: (K) 9.11%

Barely: (K) 11.07%

Barely: (K) 10.69%

Weak: (Th) 1.93%

VERY Strong: (U) 72.63%

VERY Strong: (U) 55.24%

Strong: (Th) 27.08%

Mild: (Ce) 7.06%

Mild: (Ce) 3.57%

Weak: (Ce) 28.31%

Weak: (Ce) 25.30%

VERY Strong: (U) 48.64%

Weak: (Ce) 16.74%

Barely: (K) 3.87%

Barely: (K) 4.58%

Barely: (K) 8.96%

Barely: (K) 35.47%

Barely: (K) 0.60%

Mild: (Ce) 1.98%

Barely: (K) 9.71%

Mild: (Ce) 2.66%

Barely: (K) 5.46%

Weak: (REE) 29.53%

Barely: (K) 10.07%

Barely: (K) 17.91%

Barely: (K) 1.93%

Barely: (K) 9.81%

Very Strong: (U) 56.53%

Barely: (K) 3.95%

Weak: (Ce) 29.17%

Barely: (K) 0.45%

Weak: (Ce) 23.01%

Barely: (K) 9.81%

Barely: (K) 6.69%

Barely: (K) 4.31%

Barely: (K) 14.05%

Weak: (Ce) 28.69%

Barely: (Rb) 0.52%

Barely: (K) 9.33%

Barely: (Rb) 1.20%

Strong: (U) 6.38%

Barely: (K) 4.12%

Barely: (K) 4.28%

Weak: (Ce) 27.48%

Barely: (K) 3.77%

Barely: (K) 3.15%

Very Strong: (U) 15.88%

Barely: (K) 10.69%

Very Strong: (U) 71.25%

Barely: (K) 5.59%

Strong: (Th) 25.29%

Barely: (K) 23.81%

Barely: (K) 3.80%

Barely: (K) 8.47%

Very Strong: (Th) 87.88%

Very Strong: (Th) 71.59%

Barely: (K) 10.40%

Mild: (REE) 3.64%

Very Strong: (U) 59.27%

Strong: (U) 7.99%

Barely: (K) 6.14%

Radioactive Gems

The gemstones above are radioactive as defined in 49 CFR 173.403 (greater than 70 Bq/gram), but are considered safe under most circumstances since gemstones of these types are usually small. However, gems with Strong and Very Strong radioactivity should be handled carefully with very limited contact and exposure.

The following radioacitve elements are found in radioactive gems (click on the elements for more information):

The following radioactive elements are also Rare Earth Elements (REE):
Ce - Cerium,  La - Lanthanum,  Nd - Neodymium,  Pr - Praseodymium,  Sm - Samarium,  Th - Thorium

Below are more details on the radioactive minerals gems. They are listed in order of their strength of radioactivity from strongest to least as measured by their GRapi units (Gamma Ray American Petroleum Institute). Hover your cursor over a gem name to see a picture of that gem type or click on the gem name to open a new page with detailed information about that gem type and our gems for sale.

  Coffinite - VERY Strong; GRapi = 5,176,587.32 - contains 72.63% Uranium (U)
  Soddyite - VERY Strong; GRapi = 5,126,250.25 - contains 71.25% Uranium (U) 
  Vandenbrandeite - VERY Strong; GRapi = 4,352,567.33 - contains 59.27% Uranium (U) 
  Meta-Autunite - Very Strong; GRapi = 4,234,083.25 - contains 56.53% Uranium (U) 
  Cuprosklodowskite - Very Strong; GRapi = 4,140,994.92 - contains 55.24% Uranium (U)
  Autunite - Very Strong; GRapi = 3,754,512.44 - contains 48.27% Uranium (U)
  Francevillite - Very Strong; GRapi = 3,545,303.50 - contains 48.64% Uranium (U)
  Thorianite - Very Strong; GRapi = 1,505,305.18 - contains 87.88% Thorium (Th)
  Betafite - Very Strong; GRapi = 1,310,418.25 - contains 17.20% Uranium (U)
  Thorite - Very Strong; GRapi = 1,281,657.29 - contains 71.59% Thorium (Th)
  Samarskite-(Y) - Very Strong; GRapi = 1,202,300.20 - contains 15.88% Uranium (U)
  Yttrocrasite-(Y) - Strong; GRapi = 784,722.58 - contains 7.79% Thorium (Th); 7.99% Uranium (U)
  Polycrase-(Y) - Strong; GRapi = 603,860.75 - contains 6.38% Uranium (U); 6.22% Thorium (Th)
  Ekanite - Strong; GRapi = 542,060.77 - contains 27.08% Thorium (Th)
  Steacyte - Strong; GRapi = 506,988.54 - contains 25.29% Thorium (Th)
  Monazite-(Ce) - Weak; GRapi = 91,584.19 - contains Rare Earth Elements (REE); 29.17% Cerium (Ce), 14.46% Lanthanum (La), 12.01% Neodymium (Nd), 4.83% Thorium (Th)
  Bastnäsite-(Ce) - Weak; GRapi = 60,386.61 -contains 63.94% Cerium (Ce)
  Parisite - Weak; GRapi = 50,156.22 - contains 28.69% Cerium (Ce), 23.27% Lanthanum (La)
  Gadolinite-(Ce) - Weak; GRapi = 44,145.76 - contains 17.99% Neodymium (Nd), 16.74% Cerium (Ce), 10.98% Lanthanum (La)
  Fergusonite-(Ce) - Weak; GRapi = 40,097.08 - contains 28.31% Cerium (Ce), 14.03% Lanthanum (La)
  Chevkinite-(Ce) - Weak; GRapi = 37,661.04 - contains 28.31% Cerium (Ce), 14.03% Lanthanum (La), 1.93% Thorium (Th)
  Rémondite-(Ce) - Weak; GRapi = 36,248.83 - contains 27.48% Cerium (Ce), 9.08% Lanthanum (La)
  Kentbrooksite - Weak; GRapi = 29,710.44 - contains 29.53% of the Rare Earth Elements (REE) Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Samarium (Sm)
  Fluorbritholite-(Ce) - Weak; GRapi = 29,254.55 - contains 25.30% Cerium (Ce), 13.72% Lanthanum (La)
  Allanite - Weak; GRapi = 27,438.55 - contains 27.35% Cerium (Ce), 17.46% Lanthanum (La)
  Aeschynite-(Ce) - Weak; GRapi = 27,088.82 - contains 27.50% Cerium (Ce)
  Mosandrite - Weak; GRapi = 23,082.68 - contains 23.01% Cerium (Ce)
  Eudialyte - Mild; GRapi = 7,287.91 - contains 7.06% Cerium (Ce)
  Johnsenite-(Ce) (incl.) - Mild; GRapi = 6,454.67 - contains 2.66% Cerium (Ce), 1.36% Lanthanum (La)
  Burbankite - Mild; GRapi = 5,871.73 - contains 5.95% Cerium (Ce)
  Hibonite - Mild; GRapi = 4,081.56 - contains 1.98% Cerium (Ce), 1.96% Lanthanum (La)
  Titanite (Sphene) - Mild; GRapi = 3,805.77 - contains 3.64% of the Rare Earth Elements (REE) Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Samarium (Sm)
  Euxenite-(Y) - Mild; GRapi = 3,420.62 - contains 3.57% Cerium (Ce)
  Pollucite - Barely detectable; GRapi = 484.85 - contains 1.20% Rubidium (Rb)
  Londonite - Barely detectable; GRapi = 457.11 - contains 1.05% Rubidium (Rb), 1.93% Potassium (K)
  Syngenite - Barely detectable; GRapi = 343.09 - contains 23.81% Potassium (K)
  Leucite - Barely detectable; GRapi = 255.81 - contains 17.91% Potassium (K)
  Pezzottaite (Beryl) - Barely detectable; GRapi = 212.96 - contains 0.52% Rubidium (Rb), 0.06% Potassium (K)
  Adularia (Feldspar) - Barely detectable; GRapi = 200.97 - contains 14.05% Potassium (K)
  Amazonite (Feldspar) - Barely detectable; GRapi = 200.97 - contains 14.05% Potassium (K)
  Orthoclase (Feldspar) - Barely detectable; GRapi = 200.97 - contains 14.05% Potassium (K)
  Charoite - Barely detectable; GRapi = 154.18 - contains 10.69% Potassium (K)
  Sanidine (Feldspar) - Barely detectable; GRapi = 152.94 - contains 10.69% Potassium (K)
  Tinaksite - Barely detectable; GRapi = 148.49 - contains 10.40% Potassium (K)
  Lepidolite - Barely detectable; GRapi = 143.68 - contains 10.07% Potassium (K)
  Mariposite - Barely detectable; GRapi = 140.52 - contains 9.81% Potassium (K)
  Muscovite (Mica) - Barely detectable; GRapi = 140.52 - contains 9.81% Potassium (K)
  Alunite - Barely detectable; GRapi = 136.78 - contains 9.44% Potassium (K)
  Hyalophane (Feldspar) - Barely detectable; GRapi = 135.85 - contains 9.71% Potassium (K)
  Phlogopite - Barely detectable; GRapi = 133.53 - contains 9.33% Potassium (K)
  Celadonite (incl.) - Barely detectable; GRapi = 130.24 - contains 9.11% Potassium (K)
  Görgeyite - Barely detectable; GRapi = 129.09 - contains 8.96% Potassium (K)
  Taranakite - Barely detectable; GRapi = 128.51 - contains 8.74% Potassium (K)
  Alum-(K) - Barely detectable; GRapi = 124.32 - contains 8.24% Potassium (K)
  Nepheline - Barely detectable; GRapi = 95.15 - contains 6.69% Potassium (K)
  Canasite - Barely detectable; GRapi = 89.32 - contains 6.22% Potassium (K)
  Yuksporite - Barely detectable; GRapi = 86.57 - contains 6.14% Potassium (K)
  Astrophyllite - Barely detectable; GRapi = 85.21 - contains 6.07% Potassium (K)
  Kaliborite - Barely detectable; GRapi = 79.53 - contains 5.46% Potassium (K)
  Sogdianite - Barely detectable; GRapi = 79.14 - contains 5.59% Potassium (K)
  Apophyllite - Barely detectable; GRapi = 62.81 - contains 4.37% Potassium (K)
  Poudretteite - Barely detectable; GRapi = 61.48 - contains 4.28% Potassium (K)
  Neptunite - Barely detectable; GRapi = 60.73 - contains 4.31% Potassium (K)
  Fluoro-potassichastingsite - Barely detectable; GRapi = 58.40 - contains 4.12% Potassium (K)
  Milarite - Barely detectable ; GRapi = 56.71 - contains 3.95% Potassium (K)
  Ganophyllite - Barely detectable; GRapi = 55.45 - contains 3.87% Potassium (K)
  Sugilite - Barely detectable; GRapi = 54.07 - contains 3.80% Potassium (K)
  Rhodizite - Barely detectable; GRapi = 52.60 - contains 3.77% Potassium (K)
  Sadanagaite - Barely detectable; GRapi = 44.72 - contains 3.15% Potassium (K)
  Baratovite - Barely detectable; GRapi = 39.51 - contains 2.78% Potassium (K)
  Hanksite - Barely detectable; GRapi = 35.47 - contains 2.50% Potassium (K)
  Afghanite - Barely detectable; GRapi = 32.54 - contains 2.28% Potassium (K)
  Ajoite - Barely detectable; GRapi = 31.60 - contains 2.24% Potassium (K)
  Arrojadite-(KFe) - Barely detectable; GRapi = 26.90 - contains 1.92% Potassium (K)
  Barrerite - Barely detectable; GRapi = 22.57 - contains 1.55% Potassium (K)
  Chabazite - Barely detectable; GRapi = 11.07 - contains 0.75% Potassium (K)
  Heulandite - Barely detectable; GRapi = 8.68 - contains 0.60% Potassium (K)
  Mordenite - Barely detectable; GRapi = 6.53 - contains 0.45% Potassium (K)
  Gmelinite-Na - Barely detectable; GRapi = 4.58 - contains 0.31% Potassium (K)
  Boleite - Barely detectable; GRapi = 4.47 - contains 0.36% Potassium (K)