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They’re not crystals
Corundum ranks 9 on the Mohs hardness scale and is found in metamorphic and igneous environments worldwide
45" and weighs 2
Amazonite is a green to blue-green variety of microcline feldspar (KAlSi₃O₈)
It often pseudomorphs to malachite
Franklinite | Franklin, NJ Specimen They’re not crystalsFranklinite is a dense, black, metallic zinc iron manganese oxide mineral belonging to the spinel group. Found in Franklin and Sterling Hill, New Jersey, it is now the official state mineral of New Jersey. It typically forms octahedral crystals, is weakly to moderately magnetic and has a Mohs hardness of 5. 56. 5. These specimen fluoresce beautifully under blacklight, making them incredibly unique! This item is 4 x 3 x 2 and weighs 34. 65 oz
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US$ 700.00
US$ 56.00
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