Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Testing Stone by Grobet Sale $5.30 | / SKU 56-744 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Testing Stone Stone used with solutions and test needles to determine karat values. 1-7/8" x 1-7/8" x 3/16".
