Here we have a small colour salt from Davidson, RD 176566 from 1891.
Davidson flint glass has little or no lead and tends to give density readings around 2.5g/cc
This one gave 2.75g/cc - usually translucent colour has little effect on density, with the exception of uranium colours.
So there are two possibilites here:
- They added lead along with the compound which creates this colour.
- They did not add lead for this colour and the compound used is fairly heavy and/or a significant percentage of the total mix.
Does anyone know what creates this rose/peach colour?