rock specimen collection,education tool

rockspecimen collection,education tool is 15 kinds of mineral composition, also according to the customer's request can be re-mix, Customers can also DIY.Ithas Pin, a piece of porcelain , a magnifying glass and instruction book.15 kinds mineral as below:1.Obsidian2.Granite3.Basalt4.Scoria5.Rhyolite6.Shale7.Calcareous Tufa8.Sandstone9.Conglomerate10.Limestone11.Slate12.Marble13.Quartzite14.Gneiss15.Shist 1) Mineral specimen size is(LxWxH) 1.18inch x 0.8inch x 0.4inch, 2) box size is 7.28inch x 4.9inch x 1.38inch. 3) It is suitable for teaching tools for all school.