Description Are you looking for a professional, yet affordable natural ore specimen teaching material? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our natural ore specimen teaching material must meet your needs. It is one of the best choices for you. Features -Color: Assorted Color -Material: natural crystal ore -Size: About 6.00X4.00X2.00cm/ 2.36X1.57X0.79in - Natural crystal ore, vary in size, color, shape and patterning. Stone sizes range from 30mm to 60mm - This set includes Amethyst, Rose Quartz, Lapis, Labradorite, Red Jasper, Aventurine and White Crystal - for appreciation research, popular science or collection. - Natural, realistic, modern and simple decoration. - Note: you need to rinse off, polish, tumble or cab the stones to bring out its shine.