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BEACH SAND

ROCK GARNET

WHAT IS IT?

 

Beach sand garnet is the one which gets eroded from the rock garnet and rolls down in rivers to ocean and gets accumulated on the beaches.

Rock garnet is freshly mined out and ground to required sizes.

ANGULARITY

 

These tend to have obtuse angles as their edges keep on eroding increasing the angles

Garnet has a characteristic of sub conchoidal fractures. So being freshly ground the angles are much smaller

SHARPNESS

 

On beaches these keep rubbing with each other with each wave, and this process is continuous for thousands of years. During this process the sharpness of the material is quenched.

These have much better and sharper edges as these are freshly ground

DELETERIOUS MATERIALS

These being extracted from beaches, they have contamination related to oceans. Like chloride, soluble salts, carbonates etc

Being rock garnet they do not have these deleterious materials

QUARTZ

 

The incidences of quartz are less in beach garnet

The quartz incidences are higher in rock garnet, but this is magnetically separated bring the quartz contents less than 1%

BIGGER GRAINS

This being an eroded material the larger sizes are not available, biggest size available is around 40 mesh

Its is ground from large lumps so any size is available

COSTING

 

It is only to be shovelled from beaches and sieved to required sizes, before packing. So the cost of production is very low hence can be sold very cheap.

These are to be ground, washed and separated. So the cost involvement is higher in rock garnet.

MESH <> MICRON CONVERSION CHART

 

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