u really should.
one thing for sure, Diamant sure has an edge over Starphire over thickness.
tayhonglee,
juz a suggestion, can u take pics of clams from the top of a tank, e.g. maxima, croceas. thru those 2 glass samples? imho, that will be a pretty good visual judgement as clams r well known for deceiving colors when viewed with color tinted glass.