6mm round with 3 facets or 'windows'; the surface of the windows appears
to have a matte finish
Colors/description:
black glass with a 'hematite' coating
Defects:
I have noticed a few pits in the glass.
Comments:
These beads surprised me. The windows are much smoother than
fire-polished window beads usually have, and the windows appear to have a
matte finish – they aren't smooth and shiny. The effect is very
interesting.