HuberCal® Oyster Shell
HuberCal oyster shell calcium carbonate is harvested directly from a secure source of ancient oyster beds believed to be thousands of years old.
An exclusive double-wash technology ensures that impurities are removed from the raw oyster shells prior to processing. HuberCal oyster shell products comply with California Proposition 65 standards for lead. And HuberCal oyster shell calcium carbonate has earned the right to be considered the standard for quality throughout the nutrition industry.
It is the trusted source of leading brands.


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Hubercal® is a registered trademark of J.M. Huber Corporation for calcium carbonate. THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Refer to Huber's Standard Conditions of Sale for the only express warranties applicable to the Huber products. Products incorporating Huber products are not warranted by Huber. In no event is Huber liable for consequential damages.