Northstars Borosilicate ONYX is a smooth, saturated Black Rod. Onyx can be worked hot and long without boiling issues and it is not sensitive to reduction. For best results keep it in a neutral flame. This is First Quality Glass Rod approx. 7mm in Diameter with a 20″Length. All colors shown after being flameworked.¬†
 
This item is available by the pound (LB), 1/4 lb











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