All the stones are genuine stones.  They are attached to a key chain with chain and eyelet. Because they are a natural stone... size and shapes vary.Keychains are selected for you intuitively. Agate stones are banded in stripes or layers and part of the Chalcedony family. It’s the most popular and most varied Chalcedony. This stone has a strengthening and stabilizing energy that will help you in your daily tasks. It will help you balance your energies and direct them appropriately.The energies of Agate will calm, elevate, and uplift you, making sure that positive energies flow through you by keeping you energized and empowered. Approximate size: 1 1/4" x 1" to 1" x 3/4"