Sharpie fine point permanent markers work better on glass than Sharpie pens.
I can clean Stazon ink off glass and stamps with alcohol, so no wonder it smears with alcohol inks. I’ll have to find something else to use with them. Memento looks good, and so does Ranger Archival ink.
Metallic gel inks look good under glass and can be used to highlight images before decoupaging them. (See the navy and white gem.)
Alcohol inks can be used to color Diamond Glaze. Sharpie ink can be used on top of that when it dries. (yellow gem)
Stamps are expensive. Simple designs can be drawn with permanent ink pens. Look for Memento pens (heart gem)
The best way to stamp glass gems is to ink the stamp and very carefully press the gem to the stamp. Pick the gem straight up from the stamp. (butterflies gem)