The National Geographic Stone and Mineral set contains 15 incredible specimens that will surely inspire you to get into geology and earth sciences. Comes with hematite, two samples of rose quartz, snowflake obsidian, tiger's eye, red jasper, two samples of green aventurine, green zebra jasper, desert rose, pumice stone, pyrite, blue quartz, blue calcite and fluorite. There is also a magnifying glass with which you can examine stones, semi-precious stones and crystals, and you also get a storage and presentation box. A useful, color identification guide provides fascinating information.