Got my hands on some Reichenbach 104 CoE glass called Ocean. Ocean appears to be a blue aventurine, or blue + aventurine. It's got sparklies in it, and it's not so dark blue as to be nearly black.
The sparkle is fairly subtle, as with aventurine in general, but it works pretty easily too.
This is a 104 CoE glass, and I had no issues with compatibility.