''starphire'' is a copywrited name by PPG. glass Co.
all other ''low iron'' glass although may be equally clear cannot call themselves starphire without facing a lawsuit
It could be that they are now using true Starphire. When I purchased my tank in May of 2006, Oceanic had a "low lead" glass they were using... can't remember the name they were calling it, but it was not Starphire. I remember contemplating the choice between the two, and luckily I made the right choice going with the Staphire.
If the edge of your glass is not BLUE ... then you don't have Starphire.