The product is natural ore, made of quartzite mineral materials, beautiful and practical, with good texture. It has a clear stone texture, natural and delicate characteristics, suitable for research, teaching, collection of excellent props and materials. It is a very practical mineral rough and will be an excellent choice for your teaching materials. Features -Color: Transparent -Material: Quartzite mineral -Size: 3.00X3.00X3.00cm/ 1.18X1.18X1.18in -Composed of natural quartzite mineral materials, beautiful and practical, and durable. -It can be widely used in the research and teaching of geography, archaeology and other activities. -Useful teaching stones for teachers to let kids know more about stones. -The ore has an exquisite appearance and a sense of mystery, which can be used in DIY well. -This is a very practical rock-forming mineral and a good teaching and research material.