Most Brazilian diamonds come from which type of sources?

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Multiple Choice

Most Brazilian diamonds come from which type of sources?

Explanation:
Diamonds in Brazil are predominantly recovered from alluvial placer deposits. Diamonds form in deep underground kimberlite, but in Brazil erosion wears away the host rocks and rivers transport the diamonds, concentrating them in river gravels, terraces, and floodplains. These secondary, alluvial deposits are typically easier to mine than digging for primary kimberlite pipes, so they account for the majority of Brazilian diamond production. Oceanic and desert sources aren’t representative of Brazil, and while primary kimberlite occurrences exist, they’re not the main source of the diamonds mined there.

Diamonds in Brazil are predominantly recovered from alluvial placer deposits. Diamonds form in deep underground kimberlite, but in Brazil erosion wears away the host rocks and rivers transport the diamonds, concentrating them in river gravels, terraces, and floodplains. These secondary, alluvial deposits are typically easier to mine than digging for primary kimberlite pipes, so they account for the majority of Brazilian diamond production. Oceanic and desert sources aren’t representative of Brazil, and while primary kimberlite occurrences exist, they’re not the main source of the diamonds mined there.

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