XIAMEN XIULONG TRADING CO., LTD IS A PROFESSIONAL STONE TRADING COMPANY WITH QUARRY MINING,STONE PROCESSING,IMPORT&EXPORT.WE HAVE A BASALT QUARRY AND A BIG FACTORY IN VIETNAM,THOSE ARE RUN BY CHINESE SKILLFUL WORKERS.NOW A DAYS,OUR VIETNAM BLACK AND VIETNAM GREY PRODUCTS ARE VERY POPULAR IN MANY COUNTRIES.