Purple Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO2)
mineral
Category
This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)
Mineral, part of a rock
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Sunstone
Oligoclase or Andesine (Feldspar Group), (Ca,Na)((Al,Si)4O8)
mineral
Silicon
Silicon (Si)
mineral
Tiger's Eye
Silicon dioxide with crocidolite fibers (SiO2 with chrysotile amphibole inclusions)
Mineral
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Mineral
Granite
Granite (Phaneritic igneous rock)
igneous
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Mineral for Fluorite; Mineral/Rock for Jadeite (as it's often a rock composed primarily of jadeite mineral)
Granite (Dioritic or Hornblende-rich)
Phaneritic Plutonic Felsic to Intermediate Igneous Rock
igneous
Blue Lace Agate (with Amethyst Geode center)
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
mineral
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
mineral
Emerald In Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Amethyst (Tumbled)
Purple Quartz (SiO2 with iron impurities and irradiation)
mineral
Jasper (Yellow/Brown variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (varieties include Flint or Jasper)
Chert (cryptocrystalline quartz; SiO₂)
Sedimentary
Rough Diamond
Pure Carbon (C)
mineral
Quartz (Milky Quartz pebble)
Silicon Dioxide (SiO2)
mineral
Citrine
SiO2 (Silicon Dioxide)
Mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Fluorite (Rainbow or Multi-colored Fluorite)
Fluorite (Calcium Fluoride - CaF2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Amber (Rough Baltics/Beach Specimen)
Succinicum (Organic Gemstone - Fossilized Resin)
mineral
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Mineral
Agate (Carnelian-Blue Agate mix)
Silicon Dioxide (SiO2)
mineral
Agate (specifically Botswana or Banded Agate variety)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Mineral
Native Gold Nuggets
Native Gold (Au)
mineral