Can You Solve this Ice Diamond Riddle? ft. Vsauce’s Michael Stevens

This reminds me of the riddle you did about throwing a rock in the lake from a boat, would the water go up or down? I now think of the extremes like you said. Let’s forget about the ice for a second and focus on the diamond, it’s displacing it’s own weight of water when floating,, which is more volume than the diamond, therefor when the diamond sinks the level would go down. Ice displaces it’s own weight of water causing the level to stay the same when melting, so ice wouldn’t play a role in this. Therefore, the level would go down when the ice melts and the diamond sinks. Think of a thousand pound diamond that’s the size of a ping pong ball, it needs a lot of water displaced to float but only displaces a very small amount when submerged.