Vintage Smoked Irridescent Blue Glass Snowflake Tumblers- Set of 6

Description

These look like they could be modern glass- until you pick them up. They're thinner and finer than normal glass, … more These look like they could be modern glass- until you pick them up. They're thinner and finer than normal glass, more of old crystal type. There's a fine, iridescent blue smoke to them and there are finely designed snowflakes in grey and in relief against the glass. It appears as though whatever applied the grey design was used to mask the glass from the original "smoke" color. I've never seen anything like it before, nor has google lens. I would date it to at least the 60s, simply by the thinness of the glass. I can't imagine it was made much later than that if even that. less