Here's four points I worked on this weekend - brushed the cobwebs off my tool box. Two are made of colored glass, one from an unknown white chert with poka dots and one from agatized coral. The glass came from a friend in GA who gets broken art glass, mixes it together in a mold and melts it in a kiln. He then slabs it for jewelry, tumbled glass and for knapping. Blue point has a green tip, then blue, then cobalt blue, and the base is red. Rick B