The lightest of the three self-striking Rubies. Work in a neutral flame. Will not liver or develop brown hues. The strike must be completed in the kiln at 1050 deg F.
This piece of Northstar Borosilicate coloured tube is 510mm long. Because it is hand drawn the tube is 21mm o.d with a 4mm wall at one end and 25mm o.d with a 5mm wall at the other.