Carnelian
Chalcedony (SiO2) with iron oxide impurities
mineral
Category
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Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.
Pearl
Calcium carbonate (CaCO3) - Aragonite/Calcite variety
mineral
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Basalt
Basalt (Aphanitic-to-porphyritic mafic volcanic rock)
igneous
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Agate Nodule (partially vuggy Quartz)
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Banded Agate
Silicon Dioxide (SiO2)
mineral
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
sedimentary
Granite
Granite (Silicic Intrusive Igneous Rock)
Igneous
Moonstone (Variety of Orthoclase Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende, chlorite, or manganese/iron oxides
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Arkosic Sandstone
Arkose
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Green Agate
Silicon dioxide (SiO₂)
mineral
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
Zoisite with Ruby / Anyolite
Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
mineral
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Carnelian
Carnelian (Microcrystalline Quartz, SiO2)
mineral
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
sedimentary
Green Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Banded Agate (Onyx Variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Yellow Jasper (Chalcedony)
Silicon Dioxide with Iron inclusions (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Piddock bored rock (Boring Stone)
Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)
sedimentary
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
sedimentary
Quartz (Druzy on Matrix)
Silicon Dioxide (SiO2)
mineral
Blue Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Onyx (Banded Calcite)
Banded Calcite / Aragonite (CaCO3)
mineral