I am working on an engagement ring for my girlfriend and I know she LOVES these kind of rings, but the only gemstone I've found that looks identical to it is Blue Sandstone which I know isn't even a "real" gem so to speak. I have also seen some "Blue Silky Sapphire" from milksapphire on Etsy thanks to u/artistdies post from a couple days ago. Are there any other gemstones that have the "starry night/galaxy" look to them?