These 1/4 inch thick black streak plates are ideal for testing the hardness or softness of minerals, as well as determining the color of lighter-colored minerals. By scratching the mineral in question against the plates, students or teachers can determine these properties by observing the quantity and hue of the residue left behind. Excellent for use in the classroom, or at home for aspiring geologists.
View the glory of space with this hi-tech telescope set!
Build a hand that realistically moves its fingers using shape memory allow technology!
The Wimshurst Machine is a high quality static machine for student labs.
Watch what your music can create with this amazing Snap Circuits set!
Build over 60 projects with this deluxe version of the Snap Rover kit!
The Y-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!