GOLD TEST STONE – TOUCHSTONES FOR ASSAY.
The Gold test stone is a Touchstones for assay the gold, the silver and the S/steel, to be used together with the
The gold testing stones are available in the following types.
– Gold test stone type “small”: 40 x 50 x 3h mm
– Gold test stone type “medium”: 50 x 70 x 3h mm
– Gold test stone type “big”: 70 x 90 x 3h mm
– Small white touchstone for assay “steel”: 40 x 50 x 3h mm
Gold test stone – Touchstone for assay.