I wonder what G. & others would think of these

"Fiery Flowers Menstrual Cycle Tracking Bracelet: Red" | Etsy

https://www.etsy.com/listing/178494595/fiery-flowers-menstrual-cycle-tracking

Materials???

https://www.avawomen.com/tracking/cycle/

More stones...

https://www.realsimple.com/shop/menstrual-cycle-tracking-bracelet-p969de5243a68772295db221954279ece.html