The volcanic in China is a kind of basalt with about 10 percent gas holes. It is hard and gray, needn't polish. As a kind of ideal decorative material, it makes the square, the tourist attraction, or the courtyard simple and unsophisticated, serious and solemn. It also can absorb the sound and dust indoor. The site of BOAO Forum Asian and the 53rd world miss final are widely decorated by the volcanic. we aslo can make the volcanic into stone table, stone chair, stone door, stone lamp and stone mill. They are very usefulness and interesting.