Welcome: 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.
Contact: RuoTian.Zhong
Phone: + 86 15314959887
Tel: + 86 13362968680
Email: 42303348@qq.com
Add: Guangdong guangzhou tianhe balance sand too road sand road
