How to Grow Your Own Crystal Geodes Cool Science ...
Mar 23, 2013· You can experiment with cooling rate – let the solution cool normally, cool it faster with a few pieces of ice, cool it really fast with a lot of ice (be careful if you''re using a glass bowl – freezing a glass bowl full of hot liquid is a recipe for a broken bowl and giant mess), cool it super slow by keeping the solution in a pan on the ...