Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Category
Mineral (Specifically A Gemstone Variety)
Browse mineral (specifically a gemstone variety) specimens identified by the Rock Identifier community.
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Shungite
Shungite (carbon-rich Precambrian mineraloid)
mineral
Carnelian (a variety of Chalcedony)
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Red Jasper
Jasper (Silicon Dioxide with Hematite inclusions), SiO2
sedimentary
Yellow Jasper
Jasper (SiO2) with iron hydroxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Beach Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert or Flint (polished/water-worn)
Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.
Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)
Jasper (Brown Iron-Rich Variety)
Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)
sedimentary
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Schist
Schist (various mineral compositions)
metamorphic
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Granite
Granite (felsic intrusive igneous rock)
igneous
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
SiO2 (Quartz with inclusion of iron oxides)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Chakra Stone Bracelet (mixed gemstones)
Multi-mineral/Gemstone assembly (primarily Quartz variety beads)
mineral
Sandstone (Ferruginous)
Arenite (with iron oxide cement, Fe2O3)
sedimentary
Porphyry (specifically Porphyritic Basalt or Andesite)
Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)
igneous
Garnet
Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)
metamorphic
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Thunderegg (specifically a Jasper/Agate-filled Geode nodule)
Silicon Dioxide (SiO2) within Rhyolitic Matrix
igneous
Red Jasper (with Quartz inclusions)
Silicon Dioxide (SiO2)
sedimentary (physico-chemical)
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Amethyst (variety of Quartz)
SiO2 (Silicon Dioxide)
Mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt with Epidote/Chlorite
Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))
igneous