Simply a soul sand glass mod. Adds two types of glass, Soul Sand Glass & Obsidian Soul Sand Glass. Both have pane variants, & can be dyed. Soul sand glass drops shards like quark (which aren't stained). They don't block light, although I'd add that feature if I knew how.
Glass:
Smelt it:
Recycle it:
Frame it:
(Obsidian variants have higher blast resistance & require iron tools to break)
Cut it:
Cut it harder:
Color it:
You're welcome to do anything with the mod, enjoy