Sardonyx is a unique variety of the well-known onyx mineral, classified as fibrous chalcedony quartz with a distinct flat-parallel layered structure. Its mesmerizing multi-colored bands captivate stone enthusiasts with their natural beauty. 

Some rare specimens feature a nearly transparent outer layer, allowing light to penetrate up to 4 cm in depth. However, sardonyx is more commonly found in an opaque, matte form with a subtle waxy sheen. Its color palette is diverse, ranging from striking red-black contrasts to warm honey-gold layers and vibrant scarlet veins.