2356 - HARDNESS COLLECTION WITH TEST KIT - 9 SPEC.
2356 - HARDNESS COLLECTION WITH TEST KIT - 9 SPEC.
2356 - HARDNESS COLLECTION WITH TEST KIT - 9 SPEC.
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2356 - HARDNESS COLLECTION WITH TEST KIT - 9 SPEC.

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This is the Traditional Scale of Hardness Collection (without diamond) and a Test Kit.  Includes Streak Plate, Penny, Glass Plates, Nail and nine specimens 1” X 1.5” that are number coded. Grades 6-12.  Geology is a required STEM subject.