When I found these little pieces of glass, I was entranced by the color. Is it the color of the sky, the sea, a quiet lake? Would it match chalcedony, aquamarine, or provide a gentle contrast to pearls? Those are all questions for you to decide. This vintage piece of Czechoslovakian glass is incised with a straight line pattern that gives it some depth and some texture. The pieces are bezel set in a hand made clasp. The hook doubles back on itself for a secure closure. The clasp is 42 mm from ring to ring, so you have to plan as it will add some length to your finished necklace. It is 12 mm wide at the widest point of the triangle and 4 mm and the skinniest. The clasp is just 5 mm thick. See also Lapis blue hook clasp.