Did you have one of these tiny crystal hearts as a kid? This one is 55% Lead [557,800 ppm!] 100 ppm is unsafe for kids.
When tested with an XRF instrument this vintage (likely c. 1977-1989) crystal heart charm / fidget (it is not a bead, but something someone might hold in their hand or keep in a keepsake box)…. had the following readings: Lead (Pb): 557,800 +/- 77,000 ppm Antimony (Sb): 2,663 +/- 620 ppm Zinc (Zn): 21,100 +/-…