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Glass Scratch Plate / Tile (Rounded for safety)

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Lighthouse Educational
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 Product Description

Glass Scratch Plate

Scratch Plates are used to help identify the hardness of a rock or mineral specimen.

This is a thick tile to protect against breaking.
Round for easy and safer use.
Measures: 1" approximately

  Hardness testing with a glass plate: 

To perform a simple mineral test simply scratch your mineral across the glass plate.
If the mineral scratches the plate, it is harder than 5.5 on Mohs hardness scale.

Sold Individually

Warning: Item is made of glass and can cause cuts with handling and use.



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