At a quick glance it reminded me of the rather basic looking shapes from Schrotter's (Czech.) 'Lord' Range, but it's cut and not pressed - only £2.00 in the charity shop, so no great expense. The cutting is quite sharp and well done - the base is flat polished entirely, with the sort of wear than might suggest 40 - 60 years of age, but that's only my speculation. Has a very prismatic appearance. Quite heavy at 6.5" (165 mm) tall.
I've no idea of origin really, but would be surprised if it didn't come from eastern Continental Europe somewhere, particularly bearing in mind the flat base. thanks for looking.