I have no idea where these were made and who made them. They are pressed glass. The metal part has a flat top rather than pointed one. The base has a partial star cut style pattern with no pattern in the centre.http://glassgallery.yobunny.org.uk/albums/userpics/10011/Picture_2319.jpg
I've just noticed a variation in the pattern on the other two sides. All is the same except that the diamonds are smaller.