Purple Agate Slice Geode Druzy Rock Stone Paperweight Polished Front Gray White

This lovely purple geode slice rock stone was found at an estate sale. It looks like it is either purple agate or purple onyx but I am not sure. It has shades of purple, gray, and white with some crystallization showing (geode). The front is polished and smooth. It measures approximately 3.06" high x 3.30" wide x 1.38" deep. I do not know if it is natural or dyed. It has a flat bottom and can be used as a paperweight. There are no markings to indicate a brand or artist. It is in good preowned condition and would look so pretty on a shelf or to collect.