Pakistan and Afghanistan are known for their rich deposits of high-quality onyx stone. Onyx is a type of banded chalcedony, a mineral made up of layers of different colors. The stone is highly valued for its striking appearance, which features smooth, parallel bands of color that run through the stone.

The onyx blocks that are found in Pakistan and Afghanistan are highly sought after in the international market. The stones are typically large and have a variety of colors, ranging from white to black, with shades of green, brown, and yellow in between. The stone is often used for decorative purposes, such as in sculptures, vases, and other ornamental objects.

The mining of onyx blocks in Pakistan and Afghanistan is a major industry in both countries. The process involves extracting the stone from quarries using heavy machinery and cutting it into blocks using saws and drills. The blocks are then transported to factories where they are processed and polished to bring out their natural beauty.

Pakistan is the largest exporter of onyx blocks in the world, with a significant portion of its exports going to countries like China, Italy, and the United States. Afghanistan is also a major producer of onyx blocks, and the stone is highly prized in the local market.

Overall, the onyx blocks from Pakistan and Afghanistan are highly valued for their unique and striking appearance. They are a testament to the natural beauty of the region and the skilled craftsmanship of those who work with the stone.