| This collection is an excellent source for the study of mineralogy. The following combinations are included in this collection:
- Scale of Hardness (with Diamond)
- Fracture
- Streak
- Cleavage
- Tenacity
- Luster
- How Minerals Are Colored
- Unusual Physical Properties
- Crystalline Aggregates
- Natural Crystal
- Fluorescent Minerals.
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 126 Piece Comprehensive Mineral/
Physical Properties Collection
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