What are those things called that look like squished glass marbles and are used in flower arrangements or crafts?

Does anyone know what they are called or where I can buy them? I’m looking for the larger ones made out of clear glass, not the ones that are the size of a marble, but the ones that are about two inches long. I already checked the crafts stores in SF (Flax, Pearl Paint,) and the Plant-it Earth store in the Castro, as well as a few hardware stores. No one seems to sell the larger ones any more.