Galena in the eye cosmetic kohl. In Ancient Egypt, this was applied around the eyes to reduce the glare of the desert sun and to repel flies, which were a potential source of disease. galena is the primary ore of lead, which is mainly used in making lead–acid batteries; however, significant amounts are also used to make lead sheeting and lead shot. Galena is often mined for its silver content, such as at the Galena Mine in northern Idaho. It is also used in pencils in the older times. Also known as "potter's ore", galena is used in a green glaze
Heavy mineral sands ore deposits in run of mine (ROM) grades as high as 86% heavy mineral concentrate (HMC). The source of heavy mineral sands is in a hardrock source within the erosional areas of a river which carries its load of sediment into the ocean, where the sediments are caught up in littoral drift or longshore drift. Rocks are occasionally eroded directly by wave action shed detritus, which is caught up in longshore drift and washed up onto beaches where the lighter minerals are winnowed. The source rocks which provide the heavy mineral sands determine the composition of the economic minerals. The source of