I got what I paid for although I expected the specimen sizes to be more uniform. Also the nail provided looked chromed which will mess up the testing against it. I would have liked to have them in a portable and more compact divided poly box. Also the magnifier was a toy, with a narrow field of view. I am glad I have my own microscopes.
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The Moh's Hardness kit is great for showing streak and hardness for when I teach about rocks and minerals. It comes with rock samples and what you need to show the "1 though 10" scale of hardness. It gives that "little extra something" when you're teaching this particular concept.
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I have not given the gift yet. I hope she likes it. She likes to study different types of rocks.
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Moh's hardness scale set with 9 specimens really only has 8 "real" specimens as the item listed as Topaz is more like a piece of manufacturered plexiglass (clear and transparent). It has none of the characteristics identified in the accompanying book and can't even scratch fluorite let alone quartz. Attempts to scratch anything harder than gypsum result in pieces of the "Topaz" flaking off.
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We bought this for a cub scout demonstration and it worked well. Good mineral samples provided. There may be better kits out there, but this is good for the price. I was a bit confused with the purpose of the included nail (part of the hardness scale) and the magnifying class is fairly cheap, but it worked well enough for demonstration purposes. One could find each mineral at a rock shop, hardness scale on the net, a magnifying glass in any toy store, and nail in your front tire, but it is nice to have it all contained in one kit.
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