Genuine, rough (unpolished) rocks and minerals - Each mix includes LARGE, unique specimens. Herkimer Diamonds are small in comparison to other Lil' Prospectors mineral specimens. Look carefully before discarding sand and pebbles. The April Birthstone Kit features Herkimer diamonds (a special kind of quartz), meaning each bag is guaranteed to include numerous samples of Herkimer diamonds. Other rocks and minerals may include agate, carnelian, chalcopyrite, Dalmatian stone, garnets, jasper, labradorite, moonstone, petrified wood, pyrite, quartz, quartzite, sodalite, and more Each kit includes 8-pounds of screening mix with over 1.5-pounds of rocks and minerals, a 10-inch plastic sifter (green, blue, red, or yellow), a 10-inch plastic scoop (green, black, or orange), a plastic bag to collect samples, and an identification card Identification card with large photos makes identifying gemstones easy Fun and Educational - Lil' Prospectors Kits bring Earth science right to your door! Sift the mix for rocks and minerals, while learning how to identify your new specimens. Versatile, STEM Fun for the Whole Family - Grab a bucket of water to experience a true gem mining experience in your own backyard. Or sift through the dry mix with your hands, scoop, or sifter for hours of hands-on fun and discovery! Excitement for All Ages - Lil' Prospectors Kits can be used as both sensory play for younger children and hands-on gem mining for older children and adults Discover your own treasure with the Lil’ Prospectors April Birthstone Mix! Sift through the mix for Herkimer diamonds (a special kind of quartz), agate, quartz, jasper, labradorite, pyrite, and more! Grab a bucket of water to experience a true gem mining experience in your own backyard. Or sift through the dry mix with your hands, scoop, or sifter for hours of hands-on fun and discovery! Note: Herkimer Diamonds are small in comparison to other Lil' Prospectors mineral specimens. Look carefully before discarding sand and pebbles. Happy Rockhounding!