Use these great geology tool accessories to help identify your rock and mineral samples. Hand magnifier lenses can be used to take a closer look at your rocks and minerals. White streak plates are great for determining the streak (color in powder form) of dark and colorful minerals. Black streak plates are wonderful for determining the streak of light colored minerals. Glass plates, old pennies and paperclips are all items on the Mohs Hardness Scale that will help you determine the name of your sample. If you need help determining how to use your identification accessories see the Dig Into Geology section of our website for details.