Nov 13, 2025
Apparently cranberry glass, which is a dark red glass with gold salts dissolved in it, can be up to 100 ppm—one ten-thousandth—gold.
What’s interesting about that is, a D&D copper piece is a hundredth the value of a gold piece. And one ten-thousandth is a hundredth of a hundredth. So you could have a setting use beads of cranberry glass that weigh as much as a coin (0.02 pounds, given 50 coins weighs 1 pound) as hundredths of a copper. Given the density of bead glass (≈2.5 g/cm³), they’d probably be about 0.8 inches in diameter.