Product Name: 20 kinds of mixed gem teaching specimens

product color: as shown in the figure (in-kind shooting, if there is color difference, please use the actual product)
product Size: The box is about 13 * 15cm; The stone is about 10 ~ 18mm (there may be a little deviation in the measurement of workers, please refer to the actual product)

product Weight: about 110~120g, (the actual weight can have 5G error)
product material: See the following figure( due to difficulties in collecting materials, some materials will be changed irregularly)