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World Sands Collection
Imaura, Uramura, Toba-city, Mie, Japan
This gray beach sand is moderately sorted.  It is fine/medium-sized (0.5mm or less in diameter).  It consists of sandstone, shale, siliceous rocks, seashells and so on.  There are also a few large grains 1.0-3.5mm in diameter.
one scale for 1mm
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