A Zimmi Diamond is a rare vivid yellow from the Zimmi region, which is in the heart of the rainforest region of Sierra Leone where the Mano river marks the border between Sierra Leone and Liberia.

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The Zimmi Diamond is no ordinary canary yellow diamond, because it has much higher color saturation levels. Therefore, the prices are 1.5 to 2 times higher than a regular yellow diamond, because they are very rare.

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Originally, yellow diamonds came from the earth and were created because they were exposed to nitrogen during the formation in 

kimberlite deposits before the volcano eruptions brought them to the surface. The Zimmi Diamonds have an intense yellow color, often in combination with orange, which results in a deep yellow vivid color.