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Identifying Gold Ore Determine Mine

Most precious stones belong to such formations as granitic, gneissic, porphyritic rocks, and are generally found in the dbris of such and although certain diamond-bearing soils may be of a comparatively recent age, they are for all that made up of the constituents of the older rocks.Corundum, sapphire, and ruby are found in gneiss, granite, mica slate, chlorite slate, dolomite, or granular.

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