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Why is sand black?

Updated: 8/11/2023
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16y ago

Best Answer

Sand is black only if the rock it was ground down from was black.

Lava is good example.

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16y ago
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14y ago

It's made of basalt, and created by lava flowing into the ocean which explodes as it reaches the ocean and cools.

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12y ago

Pink sand usually has either rose quartz mixed in or eroded conch shell, both of which are pink.

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14y ago

It's usually from iron staining, but could be from weathered feldspar particles.

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13y ago

There is some sand and it looks red.

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Why is the sand on the west coast of New Zealand black?

Because they are made of black volcanic sand rather than white coral sand or white quartz/limestone sand. However, Japan has also many white sand beaches, which are made of white coral sand (southern islands) and white quartz/limestone sand (peninsulas on mainlands). White sand beaches in Japan: http://www.flickr.com/photos/ippei-janine/sets/72157600321338295/ There are also black sand beaches in volcanic countries such as Hawaii and Iceland.