Crystal Marble, commonly known in Iran as “Sang-e Chini,” is a metamorphic rock characterized by its large interlocking crystal structure. This stone is primarily composed of recrystallized calcite and is valued for its high durability, low water absorption, and unique crystalline texture that sparkles under light. Its sound when struck—clear and resonant—is one of its distinctive features.

Crystal Marble typically comes in shades of white or light gray, often with subtle streaks of blue, gold, or silver. It is widely used for interior flooring, wall cladding, stairs, and decorative elements. Famous Iranian varieties include the Azna, Neyriz, and Aligoudarz stones, which are known for their superior whiteness and crystal purity.