Добро пожаловать.~YIWU DONGQING IMP&EXP CO.,LIMITED
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The "Hardness Scale" collection is intended for use as handout material in chemistry and geography courses. The collection includes the following samples: talc, gypsum, calcite, fluorite, apatite, feldspar, quartz, topaz, corundum.
联系人：Jason
手机：+ 86 15314959887
电话：+ 86 13362968680
邮箱：42303348@qq.com
地址： No.508, Xicheng Road, Chengxi Street, Yiwu,Zhejiang,China
