STEMWARE WINE GLASS DELICATE AND BEAUTIFUL

THE GLASS MEASURES 8 1/2 INCHES HIGH AND WEIGHS 5 OUNCES.
THE STEM IS OF A LIGHT ROSE PINK COLOR.
WHAT IS INTERESTING IS WHEN YOU LOOK DOWN INTO THE GLASS IT REFLECTS A SERIES OF CONCENTRIC RINGS THAT DISPLAY THE PINK COLOR .
IMAGE # 2 SHADOWS GIVE A HINT ABOUT THE RINGS AND IMAGE # 3 BY CLOSE EXAMINATION GIVES A HINT

WOULD APPRECIATE ANY BACKGROUND ON THIS AND WHO MAY HAVE MADE THESE