Premium Gold Test Stone-Made in the USA 3" x 1-5/8" x 1/4" Economy File length is measured from

File length is measured from the tip to the end of the cut and does not include the tang

Compatible with Economy rolling mill systems

Convenient aerosol can for precise

For older models

SummaPoint 616 — Cone

Premium Gold Test Stone-Made in the USA 3" x 1-5/8" x 1/4" Economy File length is measured fromA professional grade gold testing stone made in the USA from natural Arkansas black novaculite, quarried and cut domestically. Used by jewelers and metalsmiths to test precious metals, this stonealso known as a streak stone or touchstoneprovides a reliable surface for acid based karat testing. Beware of cheap imitations made of glass, which stain and degrade quickly under repeated use. To test a metal item, rub or scratch it across the stone's