Gold& Silver Testing Supplies
Black Glass Testing Stone, 2″ x 1-1/2″ x 3/16″
Economical black glass stone used with solutions and test needles to determine karat values.
Measures: 2″ x 1-1/2″ x 3/16″
$3.95
Natural Testing Stone, 1-7/8 x 1-1/2″ x 1/4″
Natural testing stones are used with solutions and test needles to determine karat values of precious metals.
$12.25