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 crystals,
gems and minerals
gems & minerals D - E
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Datolite
Location: Knowlton Lode - Caledonia Mine
Ontonagon CO. Michigan
Chemical Composition: CaBSiO4(OH)
Hardness: 5 - 5.5 |
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Dioptase
Location: Tsumeb, Namibia
Chemical Composition: CuSiO3 -H2O, Hydrated copper silicate
Hardness: 5 (harder than other green copper minerals) |
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Dioptase
Location: People's Republic of Congo Africa
Chemical Composition: CuSiO3
-H2O,
Hydrated copper silicate
Hardness: 5 (harder than other green copper
minerals) |
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Cobaltian
Dolomite
Location: People's Rep. of Congo, Africa
Chemical Composition: CaMg(CO3)2, Calcium
Magnesium Carbonate
Hardness is 3.5 - 4 |
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Pink Kona Dolomite
"Michigan Picture Rock"
Location: Michigan USA
Chemical Composition: CaMg(CO3)2, Calcium Magnesium Carbonate
Hardness is 3.5 - 4 |
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Drusy Quartz on Chrysocolla
Location: Arizona
Variety of: Quartz
Chemical Composition: SiO2 Silicon Dioxide
Hardness: 7 |
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Dugway Geodes
Can belong to both the Chalcedony and Quartz Species.
Location: Utah
Chemical Composition: SiO2
Hardness: 7 |
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Emerald
crystals
May Birthstone
Location: Coscozz Mine, Columbia
Variety of: Beryl
Chemical Composition: Be3 Al2 Si6 O18
Hardness: 7.5 - 8
Learn more about emeralds! |
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Erythrite
Location: Bou Azzev, Morocco
Chemical Composition: Co3(AsO4)2-8(H2O) , Hydrated Cobalt Arsenate
Hardness is 1.5 - 2.5 |
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Eudialite
Chemical Composition: Na4(Ca, Ce, Fe,
Mn)2ZrSi6O17(OH, Cl)2, Sodium Calcium Cerium
Iron Manganese Zirconium Silicate Hydroxide
Chloride
Hardness is: 5 - 5.5 |
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