Zircon var. Cyrtolite in Display Case - Zirconium Ore - Canada
Size: 22x15x13mm
Weight: 490 Milligrams
Formula: Zr(SiO4)
43.14% Zirconium by mass
Locality: MacDonald Mine, Monteagle Township, Hastings Highlands Municipality, Hastings County, Ontario, Canada
Weakly Radioactive: This specimen averaged 291 CPM in a 30 CPM background (Radiacode 103), shown in the second picture. The 30 CPM background was achieved using the 3/8" thick lead shielding.
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