Was lindsays grandmother's ring pure gold?

To answer this I would look at concentrations of metals. If the ring is pure gold it should match with typical gold concentrations

Explanation:

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year