Rainbow fluorite cube

Fluorite cleanses the aura. It can be used to protect against electromagnetic stress, such as those given off by mobiles or computers.
Fluorite helps in organising and processing information and is handy to keep at your work desk as it helps you learn new information and increases concentration. 
 
All are approximate measurements
A is 45mm by 45mm
B is 45mm by 45mm
C is 40mm by 40mm
D is 43mm by 43mm