Signed JEH 12 (J.E.Holt), denoting 2012 as the year it was made. Handmade with the finest Borosilicate crystal. All of my Holt's work goes through a kiln annealing process to harden, strengthen and sometimes to strike colors. The striking colors are part of the process by which a kiln is used to darken or bring out color in glass. It reminds me of an Alley Agate furnace marble.
