Rock (Likely Sedimentary)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Ironstone with Pyrite

Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Yellow Jasper (Iron-stained Quartz)

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

Dalmatian Jasper (Dalmatian Stone)

Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)

Favosites Fossil (Honeycomb Coral)

Favosites sp. (Extinct genus of tabulate coral)

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

Quartz

Quartz (SiO2)

Pink Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Chert (Yellow Jasper/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Granitic Gneiss

Gneiss (High-grade regional metamorphic rock)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Grooved Maun Ball (Maul/Hammerstone-like Concretion)

Calcareous/Ferruginous Concretion in Sandstone Matrix

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Red Jasper (specifically Brecciated Jasper)

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone with Liesegang Rings

Arenite with Iron Oxide Liesegang Banding

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Caliche (with Lichen Cover)

Calcium carbonate-cemented soil layer (CaCO3)

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Marble

Recrystallized Calcite (CaCO3)

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Quartz

Quartz (SiO₂)

Limestone

Calcium carbonate ( преимущественно CaCO3)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)