Mineral And Sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (composed primarily of Fluorapatite)

Seashell Fragment (Aragonite/Calcite)

Calcium Carbonate (CaCO3) - Shell fragment

Pink Thulite

Thulite (Ca2Al3(SiO4)3(OH)) - Pink Zoisite

Celestite

Celestine (Strontium Sulfate, SrSO4)

Hag Stone (Sandstone with Boreholes)

Bored Sandstone (Sedimentary rock with lithophaga-style borings)

Red Sandstone

Arenite (Iron-rich)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

White Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 principal component)

Jasper (specifically Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Poppy Jasper

Silicon Dioxide (SiO2) with Hematite and Iron Oxide inclusions

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Septarian Nodule (Dragon Stone)

Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Barite

Barium Sulfate (BaSO4)

Red Sandstone

Arenite with Iron Oxide (Hematite) cement

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Red Sandstone

Arenite (with Iron Oxide pigmentation)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Barite (Desert Rose or Cockscomb variety)

Barium Sulfate (BaSO4)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Limonite/Ironstone

Limonite (Hydrous ferric oxides), FeO(OH)·nH2O

Geode with Quartz and Chalcedony

Silicon Dioxide (SiO2)

Quartz (Clear or Cloudy)

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar)

Quartz Geode or Druzy Quartz in Host Rock

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Biotite Gneiss

Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Gneiss

Foliated Metamorphic Rock

Sandstone (Quartz-rich)

Arenite (composed primarily of SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Glacial Granite with Epidote

Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Chert / Flint

Chert (SiO2)

Shungite

Non-crystalline carbon (allotrope of carbon)