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World Sands Collection
Oohama Beach, Hiwasaura, Minami-cho, Kaifu-gun, Tokushima, Japan
This light brownish gray sand is coarse/very coarse sized (0.3-1.3mm in diameter with fine gravel less than 2.8mm in diameter) and poorly sorted.  It consists of quartz, chert, sandstone, shale, seashells and so on.
one scale for 1mm
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