Model, Alpha- Corundum Crystal, is best known for its gem varieties, Ruby and Sapphire. Ruby and Sapphire are scientifically the same mineral, but just differ in color, Dimensions: 36 x 24 x 20 in, Weight: 8 lbs
Model, Aragonite Crystal, is a carbonate mineral, one of the two common, naturally occurring, crystal forms of calcium carbonate, CaCO3, It is formed by biological and physical processes, includes 44 1 inch balls,
Human Anatomy Model, The knee bone is connected to the arm bone, Eight awesome activities explore the human body from the inside out, including optical camera, tooth check-in, taste test, handy thermometer, pumping heart, lung simulation, torso model and DNA design
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