Man Made Object (Ring)

Kambaba Jasper

Stromatolite / Fossilized Algae (Rhyolitic structure)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Rose Quartz

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Emerald in Host Rock

Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium

Ocean Jasper

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

Sandstone (with Lichen)

Arenite (composed primarily of SiO2)

Sandstone (likely Quartzose)

Sandstone (Principally SiO2)

Sandstone

Arenite (primarily SiO2)

Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)

Silicon Dioxide (SiO2) with impurities

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

Quartz (pebble)

Quartz (SiO₂)

Quartz (Quartzite)

Silicon Dioxide (SiO2)

Sandstone

Quartz Arenite (a type of sandstone composed of more than 90% quartz)

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Red Sandstone

Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)

Marble

Recrystallized Calcite (CaCO3)

Obsidian

Volcanic Glass (SiO2 + impurities)

Quartzite (specifically a river-worn pebble)

Quartzite (primarily SiO2)

Limestone

Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Coral Fossil (Petrified Coral)

Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Kambaba Jasper (Crocodile Jasper)

Rhyolite containing Fossilized Cyanobacteria (Stromatolite)

Limonite (Iron-rich Siltstone / Sandstone base)

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

Red Jasper (possibly Carnelian)

Silicon Dioxide (SiO2) with Hematite impurities

Milky Quartz

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)

Jasper

Jasper (Silicon Dioxide, SiO2)

Chalcedony Nodule (Carnelian/Agate)

Chalcedony (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Serpentine

Serpentine-group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Basalt with Iron Oxidation

Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)

Limestone

Calcium Carbonate (CaCO3)

Basalt (Polished River Stone)

Basalt (Extrusive Mafic Volcanic Rock)

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)