Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Category
Man Made Material, Not A Natural Rock Or Mineral Specimen
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Polymictic breccia, possibly volcanic breccia
Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals
sedimentary
Raw Diamond
Diamond (pure Carbon, C)
mineral
Gravel and Sand Aggregate
Unconsolidated Clastic Sediment
sedimentary
Sandstone
Arenite (primary component SiO2)
sedimentary
Blue calcite (likely)
Calcite, CaCO₃
mineral
Veined Sandstone with Calcite Veins
Sedimentary sandstone with hydrothermal/mineral veins
sedimentary
Iron-stained quartzite or chert
Quartzite, predominantly SiO₂, with iron-oxide staining
metamorphic
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
gemstone
Sandstone (Iron-stained Pebble)
Sandstone (Quartz/Hematite dominated)
sedimentary
Vein-filled Sedimentary Rock
Silicified sedimentary rock with quartz/calcite vein
sedimentary
Shale (or Mudstone)
Laminose Mudrock (composition: clay minerals, quartz, and mica flakes)
sedimentary
Chert / Green Jasper
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode with Calcite/Siderite
Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions
mineral
Limonite/Goethite Iron Concretion
Hydrated iron oxide-hydroxide mixture (FeO(OH)·nH2O)
mineral
Sandstone (Quartz-rich)
Arenite (composed mainly of SiO2)
sedimentary
Diorite (Salt and Pepper Rock)
Diorite
igneous
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Diamond (in Jewelry)
Diamond (Carbon, C)
mineral
Sandstone (with Iron Staining)
Arenite (Silicon Dioxide, SiO2, often with iron oxides like Limonite)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Tumbled goldstone-like quartz pebble
Likely iron-stained quartz or jasper; exact identification requires testing
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Megalodon Shark Tooth
Otodus megalodon
fossil
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Diamond (Colorless/White)
Carbon (C)
mineral
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Tumbled ruby-bearing corundum
Corundum (Al₂O₃), likely ruby variety
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (typically SiO2 based)
sedimentary
Quartz-bearing granite or gneiss fragment
Granite/gneiss composed mainly of quartz (SiO₂), feldspar, and minor mica or ferromagnesian minerals
igneous
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Sandstone
Sandstone (composed mainly of Quartz, SiO2, and Feldspar)
sedimentary
Banded Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary