miniature flower vases or bulb forcing jars, colored luster glass

Vintage colored luster glass vases or bulb jars, probably Belgian or Italian glass? They're 3 1/2" tall, 1 3/4" in diameter across the top opening, with a narrower neck below that.

There are two each of blue luster, gold luster, ruby luster vases - just one of the amethyst luster. All seven of these vases are in excellent condition, it doesn't look as though these were ever used.