American Educational Hardness Collection with Test Kit Review

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List Price: $20.00
Sale Price: $16.97
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I purchased this set for use in our homeschool studies of earth-science. It met and exceeded my expectations---the samples (9, no diamond hardness 10 is included) are substantial and lablelled, the storage box is sturdy and attractive. Also included are a piece of glass, tile, nail and penny for use in analyzing the hardness of various samples as well as a small instructional booklet. Excellent value, far beyond the schlocky sets I've seen locally in toy and educational stores.

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Very helpful for identifying gemstones and minerals. Graded Metal picks cost almost one hundred dollars in a complete set. This does the same testing and identification function for an 85% cost saving. Along with a scale to do a specific gravity analysis, it allows me to know that an old Jade piece is Nephrite or Jadite, instead of glass or resin composite. Great buy!

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This kit has saved me from wasting money on black glass sold as black quartz. I used this kit to identify a balck glass "crystal point" that was being sold as rare black quartz. When I used the scratch test I was able to determine the "stone" had a hardness equal to that of glass which is much softer than quartzite. I was able to get a refund from the seller who lied in their auction and is selling black glass as quartz on ebay. This is a wonderful little learning tool and for me a money saving kit. would buy again.

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Exactly what I needed. Scratch plates and glass were smaller then I thought but this is for use at home so no big deal. Has a penny and a nail with it too.

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Purchased this as a gift for an 11 year old and was very pleased with it. The samples are an adequate size to interact with and the hardness testing objects are a good addition. The recipient thinks it is a very good set and is very pleased as well. At this reasonable price I would recommend this for any kids interested in rocks and for anyone teaching some earth science to their kids.