INFORMATION ON LAB AND SIMULANT STONES
Synthetic or Lab stones have the SAME chemical elements, color, hardness and crystal structure as a natural stone but it is created in man made conditions (laboratory)
A Simulant stone has the same color and appearance of the natural stone but has DIFFERENT chemical elements, hardness and crystal structure as the natural stones.
I prefer lab stones because they look exactly like natural ones with much better quality and once you have it mounted in a piece of jewellery it is difficult to tell it from a natural stone. The lab stone is also enviroment safe because it is not extrated from the ground by miners which usually do not have much respect for nature. I have all 3 type listed in my ebay store and they are identified by Simulant, Lab (Synthetic) and Natural.
See link to store:
http://stores.ebay.com/XYZ-Stones
If you have any additional questions or concerns let me know.