Description:Package: The Crystal mineral stones includes 50 colorful and unique rocks and Mineral, and with collection box and manual.Educational:Mineral Rocks Created specifically for kids, children can understand and identify different types of rocks, cultivate children's concentration, and let children understand geological science.Application: Rock and Mineral Educational Collection is great for use as educational supplies, decoration, collections, etc.Decor: Rock and mineral toy is great for tabletop decoration, you can display it in bedroom, home and office.Gift: Rock and mineral educational collection is a perfect birthday gift for any child who loves science and nature.Size Chart:Single Stone: 1cm-1.5cm/0.39inch-0.59inchBox: 23.5cmx13.5cmx10.5cm/9.25inchx5.31inchx4.13inchPackage Includes:50 stone with manualNote:1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.