Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Processed Metal) in the encyclopedia
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Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Blue Crackle Quartz (Dyed Fire Agate/Quartz)
Silicon Dioxide (SiO2) with artificial dye treatment
mineral
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Tiger's Eye (often misinterpreted as Gold Ore in this context)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
mineral
Heliotrope (Bloodstone)
Silicon dioxide (SiO2) with inclusions
mineral
Granite Pebble
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Pebble (likely Quartzite or Chert)
Clastic Sediment, potentially composed of SiO₂ (Quartz)
Mineral, Sediment
Shale (or Mudstone)
Laminose Mudrock (composition: clay minerals, quartz, and mica flakes)
sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
igneous
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Mixed Tumbled Stones Collection
Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)
multiple
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3) - primarily Hematite or Goethite shell with Sandstone core
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Hag Stone
Sandstone or Limestone with Solution Holes (Bioturbation/Erosion)
sedimentary
Porphyry
Porphyritic Basalt or Andesite
igneous
Unidentified Rock Fragment
Unknown
Rock
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Ferruginous Sandstone
Ferruginous Sandstone (Quartz grains with Iron Oxide cement)
sedimentary
Granite (Fine-grained)
Phaneritic Felsic Igneous Rock
igneous
Carborundum
Silicon Carbide (SiC)
mineral
River Stone (Sandstone or Siltstone)
Sedimentary Rock (Clastic)
sedimentary
Red Quartzite
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)
igneous
Serpentine (Serpentinite)
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Sulfur
Sulfur (S8)
mineral
Calcite crystal fragment
Calcite (calcium carbonate, CaCO₃)
mineral
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood / Chalcedony (SiO2)
sedimentary
Quartz Pebble (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral
Dyed Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
mineral
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic