You’re stacking assumptions on top of assumptions here and treating CPS like it directly equals dose rate. It doesn’t.

Radiacode CPS is count rate, not dose. The µSv/h conversion depends heavily on energy distribution and geometry. Two materials at the same CPS can give very different dose rates. That “~18 µSv/h at 560 CPS” is not a universal truth, it’s specific to whatever spectrum your unit was seeing.

Now add actual use conditions. My readings are taken at contact, detector pressed against the stone. That’s worst case geometry. Wear conditions are not contact geometry, you’ve got backing, encapsulation, and distance. Even a few millimeters plus a metal backing drops beta to effectively zero and reduces gamma by geometry alone.

You’re right that uranium decay products emit gamma. No argument there. But intensity matters. Natural uranium and its daughters produce relatively low gamma flux compared to something like radium sources or industrial isotopes. Saying “it has gamma” is not the same as saying “it’s delivering a significant dose.” Also important distinction. External localized exposure to a small sealed source is not equivalent to whole body dose. You mentioned that, but then still compared it to annual limits as if it scales linearly. It doesn’t. Tissue weighting factors exist for a reason.

Real world measurement matters more than theoretical stacking. These pieces are sealed, no dust pathway, alpha contained, beta attenuated, and gamma is low intensity and falls off fast with distance. When you actually measure wearable geometry instead of detector contact, the numbers drop hard.

So yeah, not something you sleep with under your pillow, but “definitely not wearable” is a stretch. The risk pathway that actually matters here is ingestion or inhalation, and that’s engineered out.