Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Category
Organic Mineraloid And Mineral
Browse organic mineraloid and mineral specimens identified by the Rock Identifier community.
Blue Diamond
Carbon (C) with trace Boron
mineral
Dyed Agate
Agate (Silicon Dioxide, SiO2)
Mineral
Moqui Marble (Iron Concretion)
Hematite/Goethite Concretion (Fe2O3 / FeO(OH))
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Bicolor Quartz Tumble
Silicon Dioxide (SiO2)
mineral
Limonite/Goethite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Sandstone (with secondary weathering/concretion)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Dragon Blood Jasper
SiO2
mineral
Landscape Jasper
SiO2
Mineral
Agate
SiO2
Mineral
Agate
SiO2
Mineral
Blue Lace Agate (or similar Chalcedony)
SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Greenstone
Protolith: Basaltic rock
metamorphic
Dendritic Quartz
Silicon Dioxide with inclusions (SiO2)
mineral
Amber Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Yellow Beryl (Heliodor)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Granite Pebble
Granite
igneous
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral
River Rock (Greywacke/Sandstone)
Lithic Wacke
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Jadeite
NaAlSi2O6; Jadeite silicate mineral
metamorphic
Obsidian
Extrusive igneous volcanic glass (rich in SiO2)
igneous
Pink Thulite (in Pumice-like texture)
Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)
metamorphic
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Ruby (Corundum)
Aluminum Oxide (Al2O3) with Chromium traces
mineral