A coarse almost rocky basalt feldspathoid - can be crushed and ground to give different sized specks in clays and glazes.
This is as supplied from the mine and will range in size from 15-20mm down to dust.
Description:
A coarse almost rocky basalt feldspathoid - can be crushed and ground to give different sized specks in clays and glazes.
This is as supplied from the mine and will range in size from 15-20mm down to dust.