Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Category
Mineral With Artificial Coating
Browse mineral with artificial coating specimens identified by the Rock Identifier community.
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Yellow Quartz
SiO2 (Silicon Dioxide)
mineral
Limonite (Iron Ore)
Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Dalmatian Stone
Peralkaline igneous rock containing quartz, feldspar, and arfvedsonite
igneous
Red Sandstone
Sandstone (mainly SiO2 with Iron Oxide cement)
sedimentary
Peacock Ore
Bornite (Cu5FeS4)
mineral
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
mineral
Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich Silicate)
igneous
Ferruginous Quartz (Red Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
sedimentary
Red Sandstone
Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Dyed Pink Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial dye additives
mineral
Drupa Quartz (Sparkly Drusy Quartz on Matrix)
Crystalline Silicon Dioxide (SiO2) on host rock
mineral
Rough Diamond
Diamond (C)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Purple Dyed Dalmatian Stone
Dyed Peralkaline Trachyte
igneous
Carnelian
Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)
Mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Red Sandstone Pebble
Arenite (Fe2O3 enriched)
sedimentary
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Yellow Quartz (possibly dyed)
Silicon Dioxide (SiO2)
mineral
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
sedimentary
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary (secondary classification for a weathered mineral specimen)
Dyed Agate Slice
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Sphalerite in Matrix (Polished Point)
Zinc sulfide (Zn,Fe)S
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Blue Agate (Tumbled and Dyed)
Silicon Dioxide (SiO2) with likely organic dyes
mineral
Dyed Agate Geode Slice
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz Cluster (Likely Ferruginous)
Silicon Dioxide (SiO2)
mineral
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (Hydrated iron oxide - FeO(OH)·nH2O)
mineral
Quartz Druzy on Agate
Silicon Dioxide (SiO2)
mineral
Red Sandstone (Iron-stained)
Clastic sedimentary rock (primarily Quartz with Iron Oxides)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral