Graymont Calgrit® is primarily used for the poultry and stockfeed industry.


Calgrit® limestone is manufactured from selected limestone and is screened to meet defined sizing criteria. Calgrit® is commonly used as an alternative to crushed shell and is an excellent source of calcium for poultry. 

Calgrit® as a carrier mineral.

Calgrit® can be used as a carrier mineral after coating with trace elements and subsequent application in the fertilizer sector. 

Calgrit® products are supplied in various formats including: bulk, 1000kg+ sacks and paper bags on request. 


Calgrit® is currently available from our Attunga and Riverton sites in New South Wales, Australia. Please contact our sales team to enquire further about Calgrit®.

Did you know?

There are three distinct types of limestone, defined by their magnesium carbonate (MgCO3) concentrations. These types are Dolomitic (35 to 46% MgCO3), Magnesian (5 to 35% MgCO3) and High calcium (less than 5% MgCO3).