Jasper (likely Lake Superior Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary (silica-rich mineral variety)
Category
Mineral, Specifically A Cryptocrystalline Quartz Variety
Browse mineral, specifically a cryptocrystalline quartz variety specimens identified by the Rock Identifier community.
Epidote (with Quartz and Feldspar)
Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Brown Agate
Silicon Dioxide (SiO2)
sedimentary
Agate Geode
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Chert (microcrystalline quartz)
Sedimentary
Gneiss
Gneiss
metamorphic
Chert (specifically Jasper or Brown Chert node)
Microcrystalline Quartz (SiO2)
sedimentary
Crazy Lace Agate
Silicon Dioxide (Microcrystalline Quartz) - SiO2
mineral
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Indigo Gabbro
Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)
igneous
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Orbicular Jasper
Silicon Dioxide (SiO2), variety of Chalcedony
Mineral
Quartz (Raw Rose and Milky varieties)
Silicon Dioxide (SiO2)
mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Black Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pink Tourmaline in Quartz Matrix
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)
metamorphic
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper (Cream/Yellow variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
igneous
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper pebble
Jasper (Silicon Dioxide, SiO2)
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with inclusions
sedimentary
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
igneous
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
Mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)
mineral
Sapphire
Corundum (Al2O3)
mineral