100g of naturally tumbled quartz stone crystals is what you need to add a touch of the wild to your aquarium! You'll get about 4-8 pieces of these beauties, measuring about 20-30mm each. And remember, small size discrepancies may occur (y'know, because of all that manual measuring) and colors might look slightly different on your screen. We appreciate your understanding and hope you'll love them as much as we do!