large pink frosted glass heart diamond point hobnail, vintage heart shaped night light lamp shade?

I love this big pink frosted glass heart, though I haven't been able to track down exactly what it is! I thought it might be a shade for a wall sconce or mood light, but I haven't been able to find ANYTHING else like it. It displays very nicely just as it is for Valentine's day or a coquette look.

It's molded glass in a diamond point or english hobnail type pattern, with a pink frosted finish. There's a wide smooth slot at the top of the heart, where I thought the light might have fit. You could put a bulb / cord light through that easily, but I'm not sure what kind of back / mounting this would have had. It's quite deep, and measures about 6 1/2" across the widest part of the heart.

There's a few tiny chips to the glass, and a a little marking / wear to the finish. My guess is that this is 60s or 70s, but who knows. It's vintage, for certain.