Since 1997, Great Lakes Glasswerks has operated as Quartz Supply, supplying fused-quartz tubing, rods and other glassware from Painesville, Ohio. Its specialty is taking quartz from stock or customer-supplied material and machining or fabricating it to precise shapes and dimensions, including high-volume small-bore and angle-cut work. The company also handles prototyping and quartz-glass repair, giving customers a path from an initial sketch to a finished part.