Onyx (Mar-e-Mar)
Onyx, often referred to as Onyx Marble, is a translucent, calcite-based decorative stone with vibrant natural veining in colors such as green, yellow, orange, and red. It is considered a luxury material, primarily used in high-end architectural features, wall panels, countertops, and artistic carvings. Due to its translucency, it is often backlit to create a striking visual effect.

Unlike traditional marbles, Onyx is more fragile and requires careful handling and specialized sealing to preserve its beauty. Iranian Onyx is among the finest in the world, with notable varieties extracted from Kerman, Arak, and Yazd. These stones are highly valued in international markets for their unique colors and light-transmitting properties.