History, Mining, and Value Chain of Diamonds Practice Test 2026 - Free Practice Questions and Study Guide

Primary diamond deposits are diamonds still found in their original rock, usually in kimberlite pipes that formed deep in the mantle and were brought to the surface by explosive volcanic events. In the material you’re studying, Africa is the region most closely tied to these primary deposits because the classic, prolific kimberlite pipes and early diamond mines originated there. This region became the historical source of many of the world’s primary diamonds, shaping how the course frames the concept.

Other regions do have diamonds and some primary pipes, but the material emphasizes Africa as the place associated with primary deposits, distinguishing them from secondary alluvial deposits that can accumulate when diamonds are eroded from their source and deposited elsewhere.