Best quality glass to make a tank

[robert_s]

Hi.
Somebody is going to make for me a tank (size 70"x30"30 about 200 gallons)

I know it should be 12mm thick but I am not sure what type of glass it should be. Could it be just any type of glass or I should buy some special type of glass. What is the best type of glass to make my tank?

 

[Anonymous]

Starphire

 

[robert_s]

Ok. But can you explain the difference between normal glass and starphire. Is it stronger/harder or clearer?

Are all big tanks in shops made of this type of glass? or you have to ask for this type of glass?