crystal

Had some rocks I got three of these from an estate sale a while back. The other I found in Lake Michigan. Not sure what they are. Any takers? (top one is from Lake Michigan. 2nd one is yellowish with black elongated crystals, 4th one is a deep green color, and last one is like a quartz...

I bought this from a garage sale, and I'm wondering 1.What brand it is and 2. If it is indeed crystal... There are no markings on it, I was told it was vintage. It has 6 cups matching the bowl's pattern.