Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Category
Man Made Silicate (Anthropogenic Glass)
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
Quartz (beads)
SiO2 (Silicon Dioxide)
Mineral
Red Jasper (with Quartz Veins)
Jasper (var. chert, SiO₂)
Sedimentary Rock (technically chert, a microcrystalline quartz)
Chert (Arrowhead or Projectile Point)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Agate (specifically, likely a geode slice or nodule)
Agate (a variety of Chalcedony, with chemical formula SiO2)
Mineral
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Quartz
Silicon Dioxide (SiO2)
Mineral
Peridot (Olivine)
Olivine, (Mg,Fe)2SiO4
Mineral
Strawberry Quartz
Quartz (SiO2) with inclusions of Goethite or Hematite
Mineral
Rose Quartz
Rose Quartz (SiO₂)
Mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Peridot (likely, given the color and bead form)
Olivine, variety Peridot (Mg,Fe)2SiO4
Mineral
Banded Gneiss
Gneiss (variable mineral composition)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Granite (tumbled pebble)
Granite (Plutonic Igneous Rock)
Igneous Rock
Rose Quartz
Rose Quartz (SiO₂)
mineral
Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)
Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.
Metamorphic or Sedimentary (with staining)
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
Mineral
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
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
Granite
Granite (a plutonic igneous rock)
Igneous
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
mineral
Rock Crystal Quartz
Quartz (SiO₂)
Mineral
Clear Quartz (or Rock Crystal)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Mineral
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)
Mineral (variety of Chalcedony)
Pink Opal / Peruvian Opal
Hydrated amorphous silicon dioxide (SiO2·nH2O)
Mineral
Red Jasper or Chert
Jasper (SiO2, a variety of chalcedony with iron oxide impurities), Chert (SiO2)
sedimentary
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Mineral (gemstone)
Peridot
Olivine (Mg,Fe)2SiO4
Mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Mineral
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Himalayan Salt
Halite (mineral name), chemical formula NaCl (sodium chloride). Generally, 'Himalayan Salt' is a trade name for evaporite minerals from specific regions.
Mineral
Rose Quartz
Quartz (SiO2) with trace impurities causing pink color
Mineral
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Red Jasper
Red Jasper (variety of Chalcedony, SiO₂)
Mineral