It was a small geode between the size of a large walnut and a small plum, thin walled, with tiny delicate crystals. I was a fool to give it to him. He threw it around and then put it in a container with some other larger rocks and it broke up. I also gave him my slab of amethyst crystals and that got cracked up, too. Again, my fault for giving something to a small child who plays with stuff roughly.