Ice Diamond Riddle SOLUTION ft. Vsauce's Michael Stevens

My answer to this riddle (as mentioned) would be inadequate information as the result depends on the volume of ice and diamond introduced initially as
1) If the volume of ice is less than 32.25 times the volume of diamond then the system of ice and diamond is completely submerged in the water and when the ice melts the water level decreases as volume of solid H2O decreases as it turns to liquid H2O .
2) If the volume of ice is more than 32.25 times the diamond then the system of ice and diamond floats without the diamond submerged in the water ; when the ice melt in  this case density of the system gradually increases till volume of ice becomes 32.25 times the volume of diamond till this stage the level of water increases , then it does as stated in  (1) and water level decreases till it reaches the initial level when the system of ice and diamond was introduced.

So in case 1 the water level drops      
while in case 2 water level remains the same .

About stars the blue stars are hottest . ignoring Doppler's effect .

Please correct me if I am wrong.

Happy to Learn :)~