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Description
Unglazed porcelain tiles for streak (color) testing of minerals. Available in white or black, so that the minerals, which streak very light colors, can be easily identified. Package of 10 plates. Size, 1 x 2".
Unglazed porcelain tiles for streak (color) testing of minerals. Available in white or black, so that the minerals, which streak very light colors, can be easily identified. Package of 10 plates. Size, 1 x 2".