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.
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