These dramatic vases are 10 inches tall and have a 4 1/4-inch base. They have been reproduced; the old vases have a starred base, the new ones an IG logo on a stippled background. I've also seen them with a plain base--some of which may be old. An additional clue is that the new examples have ruffled tops. Shown here are classic era amber and purple examples.

Amber, 275, 310, 525, 1,250 (all 2010), 300, 325, 350, 425, 450 (all 2011)

Green, 325, 900 (both 2010), 65, 85, 105, 110, 160 (all 2011)

Green, fantastic iridescence, 2,200 (2004)

Helios green, 135 (2002), 350 (2005)

Lavender, 125 (2009)

Marigold, 110, 120, 175, 425, 625 (all 2010), 75, 120, 150, 155 (all 2011)

Olive green, 425 (2000), 185 (2005)

Purple, 850, 1,500, 1,700 (all 2010), 850, 950, 1,200 (all 2011)

Smoke, 2,900 (2001), 950 (2009), 1,250 (2011)

Teal, 1,000 (2002), 350 (2005), 500 (2011)