Agate
Silicon dioxide (Chalcedony), SiO2
Category
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Agate
Silicon dioxide (Chalcedony), SiO2
Quartz with Iron Staining and Chlorite Inclusions
Silicon Dioxide (SiO2)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
Calcite on Limestone
Calcium Carbonate (CaCO3)
Eudialyte in Syenite (Dragon Blood Stone)
Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2
Bull Quartz with Mica and Host Rock
Massive Quartz (SiO2) with Muscovite/Chlorite inclusions
Ironstone Matrix with Jasper / Chert
Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)
Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
Flint with Iron Oxide Inclusions
SiO2 (Microcrystalline Quartz) with Goethite/Limonite inclusions
Limonite
Limonite (FeO(OH)·nH2O)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Granite
Granite (composed primarily of Quartz, Potassium Feldspar, Plagioclase Feldspar, and Biotite/Mica)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Gabbro or Diorite with Quartz/Epidote Vein
Intrusive Igneous Rock (Plutonic)
Amethyst (or Rose Quartz)
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Sandstone (Calcareous/Lithic)
Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)
Chert / Chalcedony Blend
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Chalcedony / Yellow Agate
Silicon Dioxide (SiO2)
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Limonite (Iron Ore / Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Chrysocolla with Malachite
Cu2-xAlx(H2-xSi2O5)(OH)4%CnH2O (Chrysocolla)
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Apophyllite cluster
Fluorapophyllite-(K), KCa4(Si8O20)(F,OH)·8H2O
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Granite
Felsic intrusive igneous rock
Labradorite
(Ca,Na)(Al,Si)4O8
Xenolith in Basalt
Mafic Igneous Rock with Felsic Inclusion
Pegmatite
Igneous Pegmatite
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
Vesicular Basalt with Lichen
Vesicular Basalt
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Quartz fragment
Silicon Dioxide (SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Milky Quartz
Silicon Dioxide (SiO2)