Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Chalcedony and Picture Jasper Beads
Blue Chalcedony (SiO2), Picture Jasper (SiO2)
Mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Tumbled Stone
Silicon dioxide / Various silicates
mineral
Native Gold
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Native Silver
Silver (Ag)
mineral
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Sapphire
Corundum (Al2O3)
mineral
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
sedimentary
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Blue Dyed Agate Geode Slice
Chalcedony (Silicon Dioxide, SiO2) with artificial cobalt/iron-based dye
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Mica (Muscovite or Biotite)
Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)
mineral
K2 Stone (or K2 Jasper)
Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)
igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
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.
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Gold Nugget
Native Gold (Au)
mineral
Raw Sapphire / Corundum
Corundum (Al2O3 - Aluminium oxide)
mineral
Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)
Chalcedony (SiO2), Jasper (SiO2 with impurities)
Mineral (specifically a cryptocrystalline variety of Quartz)
Heat-Treated Citrine (Amethyst-based)
Quartz (Silicon Dioxide) - SiO2
mineral
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Basalt with Xenolith
Extrusive Igneous Rock containing Mantle Xenolith
igneous
Fossilized Shark Tooth
Elasmobranchii (various species, possibly Carcharias or Odontaspis)
fossil
Basalt Porphyry
Porphyritic Basalt
igneous
Schist
Mica Schist (Metamorphic rock)
metamorphic
Quartz (Iron-Stained or Milky)
Silicon Dioxide (SiO2)
mineral
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
mineral
Conglomerate
Clastic Sedimentary Conglomerate (SiO2 primarily)
sedimentary
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Epidote
Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Basalt with Amygdaloidal Infilling
Porphyritic or Amygdaloidal Basalt
igneous
Diamond
Diamond (C)
Mineral
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic