Showing posts from September, 2010

Growing large crystals of Copper (II) Sulphate

As a kid I grew crystals as a hobby, mostly from copper (II) sulphate and alum (potassium aluminium sulphate).  I tried it again a couple of weeks ago, did it properly this time, and grew the one pictured to the right over about 4-5 days. Wayne's This and That has some good first-hand info on hobbyist crystal growing, and I have come up with a variation on "slow cooling" which I shall call "fast cooling", to drastically speed up crystal growth at the expense of clarity.  The post describes my method, which only required about a R50 bill of materials.