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13 Cards in this Set
- Front
- Back
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Quartz
Hexagonal - SiO2 HN: 7 SG: 2.7 Cleavage: None Fracture: Conchoidal Streak: white Luster: dull |
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Chalcedony
Hexagonal - SiO2 HN: 7 SG: 2.7 Cleavage:None Fracture: Uneven Streak:White Luster: Waxy to dull |
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opal
Amorphous- SiO2.nH2O HN: 5-6 SG: 1.9-2.3 Cleavage:None Fracture: conchoidal Streak: White Luster:Vitreous |
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Orthoclase - KAlSi3O8
Monoclinic HN: 6-6.5 SG: 2.5-2.6 Cleavage: perfect Fracture: Subconchoidal to uneven, brittle Streak: White Luster:Vitreous |
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Albite - (Na,Ca)AlSi3O8
Triclinic HN: 6-6.5 SG: 2.6 Cleavage: perfect, good Fracture: Subconchoidal to uneven, brittle Streak: White Luster:Vitreous to pearly |
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microcline, orthoclase, sanidine, albite, anorthoclase.
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Alkali feldspar family
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Plagioclase - (Na,Ca)AlSi3O8
Triclinic HN: 6-6.5 SG: 2.6 Cleavage: perfect, good Fracture: Subconchoidal touneven, brittle Streak: White Luster:Vitreous to pearly |
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nepheline - (Na,K)AlSiO4
Hexagonal HN: 5.5-6 SG: 2.6 Cleavage: Poor Fracture: Subconchoidal, brittle Streak: White Luster:Vitreous to greasy |
Nepheline
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sodalite - Na4Al3Si3O12Cl
Isometric HN: 5.5-6 SG: 2.3 Cleavage: Poor Fracture: Uneven to conchoidal Streak: White to light blue Luster:Vitreous |
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Cancrinite (yellow)
Hexagonal HN: 5-6 SG: 2.4-2.5 Cleavage: Fracture: Streak: White Luster:Vitreous - Pearly/Greasy |
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Leucite
tetragonal HN: 5.5-6 SG: 2.5 Cleavage: poor Fracture: Conchoidal, brittle Streak: White Luster:Vitreous |
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stilbite
monoclinic HN: 3.5-4 SG: 2.1-2.2 Cleavage: Fracture: Streak: Luster: |
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Scapolite
Tetragonal HN: 6 SG: 2.5-2.7 Cleavage: Indistinct Fracture: Uneven, brittle Streak: White Luster:Vitreous |
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