Coquina
Coquina (Bioclastic Limestone)
sedimentary
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Granite (Weathered)
Granite (Felsic Plutonic Rock)
igneous
Unakite
Epidotized Granite
metamorphic
Vesicular Basalt
Vesicular Basalt (Aphanitic Mafic Rock)
igneous
Serpentine (Lizardite)
Serpentine subgroup, Mg3Si2O5(OH)4
metamorphic
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Blue Sapphire
Corundum (Al2O3)
mineral
River Pebble (Likely Quartzite or Gneiss)
Metamorphosed Silicate Rock (primarily SiO2)
metamorphic
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Jade
There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.
Mineral
Banded Gneiss
Gneiss
Metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock (complex silicate)
metamorphic
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
igneous
Epidote in Matrix (Unakite-related)
Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Epidote (likely Pistacite in Epidosite rock)
Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Ferruginous Sandstone Pebble
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)
sedimentary
Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
Mineral
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
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)
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (Iron-stained)
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Granite
Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)
igneous
Granite
Intrusive Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Unakite
Unakite epidotized granite
metamorphic
Anthracite Coal
Low-grade metamorphic carbonaceous rock
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)
Igneous
Basalt
Basalt (Mafic Extrusive)
igneous
Quartzite River Pebble
Quartzite (primarily SiO2)
metamorphic