These are curious vases, made in Germany, probably between the 1960s and 1980s. All that I've seen have an odd combination of glass and iridescence: The glass is actually clear; the iridescence is very dark, heavy on purples and greens, giving the overall impression of purple glass. They all originally came with the triangular sticker shown upper right. This sticker is from the larger, 8 inch vase on the left and varies from the stickers on the smaller, 6 inch ones, with different text around the perimeter. These sell on eBay from about $20 to $50, depending on who's looking at the moment and how much interest there is.