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This collection offers an exciting look at some of the most peculiar physical properties exhibited by minerals. Properties illustrated include double refraction, magnetism, taste, fluorescence, thermal expansion and conductivity. The 15 specimens are approximately 1-1/2 “x 1-1/2” and are numbered.
This collection offers an exciting look at some of the most peculiar physical properties exhibited by minerals. Properties illustrated include double refraction, magnetism, taste, fluorescence, thermal expansion and conductivity. The 15 specimens are approximately 1-1/2 “x 1-1/2” and are numbered.
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