20. Diamonds: volcanoes, glaciers, and raining diamonds

This episode focusses on diamonds. We cover how and where diamonds form, how geologists find them, what determines their value and what are the most valuable diamonds in the world. Topics include using sub-glacial streams or eskers to trace the source of diamonds upstream, the value of the largest diamond in the world, and the formation of diamond cores in dwarf stars. We also discuss diamonds that are older than our sun, and how it rains diamonds in Neptune and Uranus. #diamonds #kimberlites #geology #Cullinan