Onyx natural stone is one of the natural stones with an average number of reserves worldwide. They are generally used in domestic and decorative items. The color of the onyx marble natural stone reserves, the original colors of which are light banded on dark gray, differs from country to country. These colored onyxes are removed upon request. For this reason, it is sold at a higher price than gray-black colored onyx stones. Worldwide green onyx natural stone is extracted only from quarries in Iran and Turkey. Even if there are other reserves in the world, it is not known at the moment. For this reason, Iranian and Turkish onyx quarries have a privileged place worldwide. Although the green color onyx stone extracted from Turkish quarries is light green, the ones extracted from Iranian quarries are in emerald green tones. Green onyx natural stones are generally used for decorative purposes in luxurious venues and places such as hotels and resorts, and in private sections of large conglomerates and companies. First-class green onyxes generally have homogeneous smoothness, while second-order green onyxes have cream and brown bands. Green onyxes are processed and sold in plates compared to gray black onyx blocks.