Natural Geode of Agate, with small quartz crystals.

Originally made for book ends, don't know the location where it was found, and it was the first minerals I ever bought, when I was a small kid (about 40 years ago). But I now let them go, due to need of space.

The 2 pieces come together and got a total weight of 1063 grams. They are 10,3 cm high.
The price is for both together.