
These diamonds, known as "secondary deposits," are often found in rivers, streams, and coastal areas where they have been carried by water. Once diamonds are brought to the surface, they are typically found in rough, uncut form. These rough diamonds must be carefully extracted and processed to reveal their full beauty and value. Diamond mining involves a variety of techniques, including open-pit mining, underground mining, and marine mining. Once the rough diamonds have been extracted, they are sorted and graded based on their size, color, and clarity. The most valuable diamonds are those that are large, clear, and free of any imperfections. These diamonds are then cut and polished to enhance their brilliance and fire.