Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
igneous
Category
Metamorphic And Igneous Rocks
Browse metamorphic and igneous rocks specimens identified by the Rock Identifier community.
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Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2)
sedimentary
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Color-change garnet (likely alexandrite-like garnet)
Likely pyrope–spessartine garnet; exact species cannot be confirmed from the image
gemstone
Milky quartz
Quartz (SiO₂), crystalline silica
mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Pink-orange mineral fragment, likely feldspar (possibly potassium feldspar)
Likely orthoclase or microcline, KAlSi₃O₈; identification from the image is uncertain
mineral
Blue Sapphire (Faceted)
Corundum (Al2O3)
gemstone
Rough White Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Sunstone Beads
Feldspar group (Oligoclase / Labradorite)
gemstone
Labradorite
Plagioclase Feldspar (Ca,Na)(Al,Si)4O8
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Red Garnet (Pyrope or Almandine)
Garnet Group (A3B2(SiO4)3)
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Garnet (Pyrope-Almandine series)
Garnet Group, (Mg,Fe)3Al2Si3O12
mineral
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
mineral
Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Muscovite on Quartz (Mica host rock)
KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)
igneous/metamorphic
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Likely quartz-bearing rock or mineral fragment
Indeterminate; possibly quartz (SiO₂) with iron-oxide staining and darker matrix
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Crystalline Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
igneous
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
mineral
Milky quartz fragment
Quartz (SiO₂)
mineral
Red garnet stud earrings (likely garnet)
Garnet group; most likely almandine, Fe₃Al₂(SiO₄)₃. The image alone cannot confirm the stone or whether it is natural.
gemstone
Feldspar (Plagioclase / Orthoclase)
KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8
mineral