I can't find this anywhere. A bowl-shaped Vase with a distinctive applied button displaying an endless knot. The knot can be called Tibetan or Buddhist but not Celtic as I understand it and is 3” in diameter. This amethyst, bubble glass bowl-shaped vase is 8” / 20 cm tall with a rim diameter of 6” / 15 cm. The base was blown slightly concave and the pontil mark is deeply ground out. any thoughts clues greatly appreciated.