IDENTIFY AND The full-color study contains information about each in the set, allowing you to view each rock, gem, and crystal in more detail. Inspiring a love of science: We have selected samples to inspire a fascination with earth science and encourage exploration of the natural . Rock Collection Mineral Gems Kit: This kit includes 15 different rocks, perfect for rock collectors, teachers or anyone who loves rocks. Great Science Gift for Kids: You can use it as birthday gift, Easter gift for It has tons of rocks to identify, quality and keeps them entertained, it' and a great way to pass the time. High Quality: All rocks and are ethically sourced and hand-sorted for the highest and . Specification: Material: Crystal Size Chart: Single Size: 20-30mm/0.79-1.18inch (there Is A Difference Of +-0.3mm/0.01inch For Irregular Size) Box Size: 12x20cm/4.72x7.87inch Package Includes: 1 Set Geology Gem