Limestone
Calcium Carbonate (CaCO3)
Category
Browse mineral (man made aura treatment) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
Demantoid Garnet on Matrix
Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
Quartzite with vugs/druzy quartz
Crystalline Silicon Dioxide (SiO2)
Limestone
CaCO3 (Mainly Calcite or Aragonite)
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
White Marble (Tumbled)
Recrystallized Calcite (CaCO3)
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Agate (translucent pebble)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
Pink Granite (Fragment)
Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
Quartz
Silicon dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Pink Granite (Gneissic Granite)
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
Peridot
Olivine (Mg, Fe)2SiO4
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Rhodonite
Manganese silicate (MnSiO3)
Granite
Phaneritic Felsic Igneous Rock
Chert (Fossiliferous)
Silicon dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Granite / Quartz Vein Rock
Granitoid with Quartz (SiO2)
Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
Serpentine
Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄
Basalt
Basalt
Pearl
Calcium Carbonate (CaCO3) with Conchiolin