What is the sandblasting of ancient French silver bracelets?

The ancient French silver bracelet was sandblasted with quartz sand. According to relevant information, the material of ancient bracelet sandblasting is timely, because ancient gold bracelet sandblasting is a process of spraying fine quartz sand on gold with high pressure. A matte surface is formed on the gold surface. But it should be noted that this is very different from the ancient gold craft. The appearance of ancient gold is matte and more delicate, while the appearance of sandblasting process is more granular. In fact, sandblasting technology is not unique to ancient gold, but a common method to deal with gold texture in gold production.