Post # 1
I made a mock up of my centerpieces over a year ago and the seafoam green sea glass I got from the Dollar Tree is no longer available there. Need color like the below picture. Where have you been able to find?
Post # 3
Did a google and found this. Hope it helps.
ETA: they seem to have a reasonable selection on their site so have a look around
Post # 4
OR this might be better value.
Post # 5
Go to craft stores like Michaels and ACMoore, they have bags for a pretty reasonable price.
Post # 6
You could also try Christmas Tree Shops.