The determination of the hardness of a mineral can be an important step toward its identification. Hardness is the resistance which the smooth surface of a mineral offers to being scratched. A diamond is the hardest of all substances, and can only be scratched by another diamond. Over a century ago, Friedrich Mohs, through a series of experiments, made up a scale of hardness which is now referred to as "Moh's Scale." It does not imply an exact harndess, but is set up so that any mineral can scratch all those beneath it in the scale, or can be scratched by those above it in the scale.
This set contains 9 different minerals, each corresponding to a different position on the scale. Each mineral is given a number, 1 being the softest (talc), and 9 the hardest (corundum). Diamond is, unfortunately, not included, but this kit will give you a good sense of the hardness scale up to that point! This kit can be used as an introductory mineral sample kit for kids to spark an interest in geology, or as a fun project; the kit includes white and glass streak plates, a penny, and a nail so you can test the hardness and color streaks for all your minerals. The minerals featured in this kit, in order from softest to hardest, are talc, gypsum, calcite, fluorite, apatite, feldspar, quartz, beryl/topaz, and corundum.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Durable, anti-fog safety glasses that fit comfortably on any head size.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
Recommended for protection against chemical splashes. A must have for every young chemist!
Large nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Exciting magnet exploration for ages 8 and up!
Learn about hydrogen fuel cells with this incredible kit!
This kit includes several different projects that demonstrate the power of magnets!
Comprehensive collection of 30 fossils.
Build a model green house and 9 other green energy-related devices with this great kit!
A massive mounted set of 100 rocks and minerals found in the US,
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