Diorite (Dalmatian Stone variant)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous
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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Granite
Granite (Felsic intrusive igneous rock)
igneous
Granodiorite Pebble
Granodiorite
igneous
Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite
Phaneritic Plutonic Rock (High Silica content)
igneous
Ironstone Concretion
Ironstone (primarily Siderite or Limonite / Goethite, FeO(OH)·nH2O)
sedimentary
Schist
Mica Schist
metamorphic
Lepidolite with Tourmaline in Quartz Matrix
K(Li,Al)3(Si,Al)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz)
mineral
Quartz Pebble with Iron Oxide Staining
Silicon Dioxide (SiO2) with Hematite/Limonite coatings
mineral
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Mineral
Muscovite Mica (in Quartz/Feldspar Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Propylitic Altered Andesite
Hydrothermally Altered Andesite
igneous
Breccia
Clastic Breccia
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt (with possible mineral veining)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Basalt (Crushed Roadstone)
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Sandstone
Arenite (predominantly SiO2 quartz grains)
sedimentary
Brecciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
sedimentary
Basalt with Quartz Veins
Mafic Igneous Rock with Quartz (SiO2) intrusions
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Tumbled dark igneous rock, likely basalt
Basalt; commonly composed of plagioclase feldspar, pyroxene, and olivine
igneous
Rounded basalt cobble
Basalt (fine-grained mafic volcanic rock)
igneous
Gabbro
Gabbro (mafic intrusive rock)
igneous
Pink Granite
Granite (Phaneritic intrusive rock rich in K-feldspar)
igneous
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Basalt (River Pebble)
Extrusive Mafic Igneous Rock
igneous
Basalt (with possible Olivine inclusions)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Agate (or Banded Agate)
Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)
Mineral, specifically a Cryptocrystalline Quartz variety
Mica Schist
Mica Schist (primarily Muscovite and/or Biotite composition)
metamorphic
Mica Schist
Schist (muscovite-biotite rich)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Gabbro
Gabbro
igneous