<a href=showthread.php?s=&postid=7538413#post7538413 target=_blank>Originally posted</a> by Unarce
Standard glass has the obvious dark green edge, which most glass tanks are made of. Low-iron glass has a clear, ice-blue edge. Starphire is the brandname of low-iron glass by PPG Industries, which is whats mostly used in the aquarium industry because its physical properties are still close to standard glass.
Diamante glass is the next step up, where the iron is completely removed, leaving a clear edge. Low-iron and Diamante glass are both considered optical-quality glass, but the absolute clarity of Diamante is useful for microscope slides, art and jewelry making. I believe Diamante glass is pretty brittle in comparison, which is likely why it's not used to make aquariums.
Oceanic will custom build Diamante tanks. There is a size limit because the structural strength of the glass is reduced as the iron is removed.<a href=showthread.php?s=&postid=7548384#post7548384 target=_blank>Originally posted</a> by Sparkss
I have read a couple of threads recently where they used Diamante also. I guess it is just about $$, how much you have and how much you are willing to spend