A good basic set containing 75 rock and mineral samples, unmounted, in a compartmentalized specimen tray. Rocks are number-coded to a list of their names by category with additional information contained in the accompanying Rocks and Minerals Study Guide. This set is used to demonstrate the major rock-forming minerals; the scale of hardness; and recognized physical properties (streak, luster, cleavage, fracture, and specific gravity). It also includes metal and nonmetal ores and igneous, sedimentary, and metamorphic rocks. Each specimen is of fairly good size (most about 1½" x ¾"). A streak plate, magnet, magnifier, nail, and copper coin are furnished so you can test for properties.
We have several rock-hounds here - as evidenced by the boxes of rocks that haunt the dark recesses under beds and in closets, when they're not strewn all over the floor! Of course, our "good" rock collections don't suffer the same fate. These have been used countless times in our homeschool, especially in our study of Earth Science. Kept in the schoolroom, the children are free to use them to identify other rocks or just to peruse for sheer delight. I guess you can tell that I am rather fond of rocks myself. The combinations and varieties that God has embedded in the Earth are astounding and beautiful. We had to "dig" a little for the information to stock these, but it was totally worth the effort!