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Your cart is empty.Product Description: Discover the fascinating world of mineral hardness with our Mohs Hardness Test Kit—an essential tool for geology enthusiasts, students, and professionals alike! This comprehensive kit includes 10 carefully selected rocks, each representing a different level on the Mohs hardness scale, and a high-quality unglazed porcelain streak plate for accurate testing and analysis. Key Features: 10 Rocks for Testing: Each rock measures 0.98 inches square, making them easy to handle and perfect for testing. The set includes minerals ranging from talc (softest) to diamond substitute (hardest), allowing you to explore the full spectrum of hardness levels. Unglazed Porcelain Streak Plate: The included streak plate measures 1.96 x 0.98 x 0.03 inches, providing a smooth, durable surface for streak testing. Simply scratch the rocks on the plate to observe the texture streaks left behind, helping you identify and differentiate minerals with ease. Educational and Practical: Ideal for classrooms, labs, or personal use, this kit is a hands-on way to learn about mineral properties, conduct experiments, and deepen your understanding of geology. Compact and Portable: The compact size of the rocks and streak plate makes this kit easy to store, transport, and use anywhere—whether you're in the field, at home, or in a classroom setting. How It Works: Scratch each rock on the unglazed porcelain streak plate. Observe the texture of the streak left behind. Compare the results to determine the hardness and identity of the mineral. Perfect For: Geology students and teachers Rock and mineral collectors Science fair projects Fieldwork and research Unlock the secrets of mineral hardness with our Mohs Hardness Test Kit—your gateway to exploring the Earth's natural wonders! Add it to your cart today and start your geological journey.
Jeff B
Reviewed in the United States on February 16, 2025
I obviously did NOT expect to get a giant chunk of diamond in this set, but I figured the "10" sample would probably be synthetic silicon carbide, and that's what it looks like.I did expect the rest of the samples to be legitimate. The "1" sample, though, is actually harder than the "2" and "3" samples; it scratched both of them! (I'm pretty sure the "2" gypsum sample is authentic, and I'm completely sure about the "3" calcite, which shows the birefringence I'd expect.) It also looks like the "8" (topaz) and "9" (corundum) actually scratch EACH OTHER, so I'm wondering if one of them is the wrong material as well.These are nice sized samples, and they come with a nice streak plate. It just looks like some of them aren't what they're supposed to be. If I figure out what the questionable samples really are, I'll follow up here.
Anne
Reviewed in the United States on February 14, 2025
I got this set because I wanted some reference specimens with which to compare rock finds. I'm not sure about some of the specimens, especially the 1 and 10 hardness - the tacl (1) should be easily scratched by a fingernail, but I was unable to made any mark on the provided piece with my nails. The 'diamond' (10) is definitely not a diamond - it may be carborundum, which has Mohs of 9-9.5, but it should be identified as such and not misleadingly labeled as something else. Overall this is a compact sized kit that comes with a nice little white streak plate, but be aware the extreme ends of the scale may not be entirely accurate for comparison purposes.
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