Granite (specifically Rapakivi Granite)
Phaneritic Felsic Igneous Rock (Granite)
Category
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
Granite (specifically Rapakivi Granite)
Phaneritic Felsic Igneous Rock (Granite)
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
Yellow Calcite
Calcium Carbonate (CaCO3)
Botryoidal Aragonite (Cave Popcorn)
Aragonite (Calcium Carbonate, CaCO3)
Amethyst
SiO2 (Silicon Dioxide)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2)
Fulgurite
Fulgurite (Lechatelierite-rich variety)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Chert (specifically Flint or Common Chert)
Chert (Cryptocrystalline Silica, SiO2)
Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)
Silicon Dioxide (SiO2) with various inclusions
Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite
Obsidian (specifically Silver Sheen Obsidian)
Volcanic Glass (approx. 70–75% SiO2 plus MgO, Fe3O4)
Quartz Pebble
Silicon Dioxide (SiO2)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Quartz (Quartzite Pebble)
Silicon Dioxide (SiO2)
Granite
Phaneritic high-silica plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky and Bull Quartz)
Silicon Dioxide (SiO2)
Orange Satin Spar (Satin Spar Selenite)
Satin Spar - Hydrous Calcium Sulfate (CaSO4·2H2O)
Banded Agate (specifically Lake Superior Agate style)
Agate (Cryptocrystalline Quartz, SiO2)
Banded Agate (specifically Lake Superior Agate)
Silicon dioxide (SiO2) - Cryptocrystalline Chalcedony
Banded Agate (specifically Lace Agate type)
Silicon Dioxide (SiO2)
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Pyrite (FeS₂)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)