Check Source for Geiger Counter, 4 Gram Monazite (Thorium Ore) Impregnated Cube

Description

Check Source for Geiger Counter, One 4 Gram Monazite (Thorium Ore) Impregnated Acrylic Cube
Condition is New.
This listing is for one cube.
Shipped with USPS wrapped  in plastic and bubble wrap.
Each cube contains at least 4 grams of powdered monazite (high grade thorium ore) suspended in an acrylic cube. Monazite contains 3.5-10% thorium dioxide and emits alpha particles and undergoes beta and gamma decay. 74% of the activity from this specimen will come from alpha particles and the remaining 26% will be from beta and or gamma decay.
The bottom side of the cube opposite the side with the trifoil warning sticker will contain the highest concentration of monazite. Placing the bottom of the cube within 1/4" of a geiger tube should give a reading higher than 420CPM.
The 4 gram monazite cube weighs approximately 6.8g and is approximately 9/16 " or 16mm on all sides.
This is a limited stock due to supply issues and no more of these will be made or listed.
This listing meets the requirements of NRC 10 CFR 40.22
It also meets U.S.P.S domestic shipping requirements for exempt limited quantities of class 7 materials according to --347.22 "are eligible under 49 CFR to be shipped as excepted packages for limited quantities" and --Exhibit 347.22 Activity Limits-- and also --173.435-- Table of A1 and A2 values
Geiger counter is not included.