Tough...

Wow! It's not as easy as you think it is. The crystal-growing poster is driving me insane =S

Still have many parts not completed:
1) Why chrome alum is purple while its solution is dark blue-green?
2) Sample photos
3) Editting

Have been cracking my head all morning wondering how to describe the octohedral shape of chrome alum. Still managed to get a rough idea though =D

Hmmm... Hope to complete everything by today so as to start on Biology XD