Non-absorbent, extremely hard and wear-resistant material. Recommended for precise elemental analysis because they provide minimal sample contamination. Hardness greater than agate. Octagon-style mortar is glazed completely except the inside grinding surface. Pestle is glazed completely except the grinding surface.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.