Why is the water in Kimberlite Mine in South Africa blue?

Kimberly is a small town in South Africa. 1867, the mother rock containing diamonds was discovered there for the first time in the world, so it was named kimberlite.

After a lot of mining, it is called the largest human-excavated mine in the world. Water seeping from rocks and rain forms beautiful mines.

Kimberlite is usually considered as alkaline or alkaline ultrabasic rock. The richer the diamond content, the higher the chromite content, the higher the diamond content and the higher the Cr content of Mg-Al garnet. After rain erosion, the degree of calcification of rocks is higher than that of ultramafic magmatic rocks, and magnesium-aluminum garnet absorbs sunlight and reflects it into water, which turns blue under sunlight.