Natural Indian Minerals
Mill Stone Minerals

Name and Composition - There are hard massive silica rich rocks. Generally quartzites/sandstones and hard garnet-biotite-quartz schists/gneisses are preferred for this purpose.

Physical Properties - These are fine granined, hard and compact grey coloured, massive garnet-biotite-quartz-schists/gneisses or grey to red coloured quartzites sandstones.

Mode of Occurrence - As bedded sedimentary deposits (sandstone); metamorphic argillaceous rocks (garnet-biotite-quartz schists/gneisses) or quartzites.

Uses - In preparing round slabs (pats) for crushing and grinding in flour mills and domestics house chakkies.

Mineral based Industries – Only cottage industries (artisam work) preparing pats/round slabs for flour mills/domestic atta chakkies.

Industrial Prospects – local level cottage industries (artisan work) for preparing pats/rounds slabs for flour mills /domestic atta chakkies.

Physical Properties
Sp. gr.
5 to 6.5
4.8 to 4.9
6.65 g/cm3
Chemical Properties
Siliceous rock
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