Zircon Crystal Tot 7 Pieces
Largest Crystal Length: 19mm
Total Weight: 28.2 Grams
Formula: Zr(SiO4)
43.14% Zirconium by mass
Locality: Brazil
Weakly Radioactive: This lot averaged 223 CPM in a 30 CPM background with the Radiacode 103 as shown in the second picture. The 30 CPM background was achieved using the 3/8" thick lead shielding in the form of two large lead pigs.
Coin and devices not included
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