The heavy duty mortar and pestles are used for samples where iron contamination is not an issue. They are inexpensive, heavy and do contaminate ground material with iron.
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Agate has exceptional abrasive resistance, high degree of chemical purity; no impurities enter sample during grinding.
Symmetrical octagonal shape. Comes with a suitable pestle.
Also available in ceramic, cast iron, and vase style.
Volume range 10ml-600ml