The Sand Atlas
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LECA

Lightweight expanded clay aggregate

Caicos Ooids

Rounded calcitic grains

Coffee

An edible grain

Couscous

An edible grain

Hamburg sand

A quartz quarry sand

Hostun sand

An angular quartz sand

Operculina ammonoides

A type of foraminifera

Ottawa sand 1µm

A rounded quartz sand

Ottawa sand 7.3µm

A rounded quartz sand

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