Mineral Within A Sedimentary Rock

Sandstone (Quartzose)

Arenite (SiO2 based)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)

Granitic Pegmatite

Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Jasper with Quartz vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Bivalve Fossil (Internal Mold/Steinkern)

Class Bivalvia (Fossilized Mold)

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Geode (unopened) or Calcareous Nodule

Siliceous or Calcareous Concretion/Nodule

Larimar

Pectolite (a blue variety of Pectolite)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Sandstone

Arenite (primarily SiO2)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Chert

Silicon dioxide (SiO2)

Geode (Unopened)

Siliceous Concretion / Geode

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartz Pebble

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Quartz Geode

Silicon Dioxide (SiO2)

Herkimer Diamond

Quartz (SiO2)

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Sandstone Pebble

Arenite (primarily SiO2)

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)

Granite

Phaneritic Acidic Igneous Rock (Granite)

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Rhyolitic Matrix

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 impurities)

Shale

Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 principal composition)