Purple Sable is a very unusual amber/purple with a coffee-coloured base and a light aventurine sparkle. The best reactions occur in a mid-range of temperatures, not too hot or too cool. Purple Sable shows different effects in different flame atmospheres - reduction, oxidation, and encasement. For a nice opalescence, trap the reduction effects under a layer of clear. Blues, purples, greens, ambers, and more can be produced on the surface of this glass.