Picked this up the other day very much like a Davidson plinth with the three feet. But i have not seen this shape, also the number 6 or 9 is pressed into the top not the base. Held up to the light it is amethyst. The measurements are
over all diameter 8 1/4", Top measurement 6 3/8", Would take a vase or centerpiece bowl with a base of 5 3/4" diameter. Stands 1 5/8" high. I would imagine what ever stands on it would be very impressive. Any help appreciated yours Mark