Sedimentary And Metamorphic Minerals

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Tiger's Eye

Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2

Aventurine (Green Aventurine)

Quartz with Fuchsite Inclusions (SiO2)

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock

Chert (varieties include Flint or Jasper)

Chert (cryptocrystalline quartz; SiO₂)

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Red Sandstone

Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)

River Jasper (Green Jasper)

Silicon Dioxide (SiO2) with impurities

Orange Quartzite (River Pebble)

Quartzite (primarily SiO2)

Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)

Diorite (Igneous rock, intrusive, intermediate composition)

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Shale

Fissile mudstone (primarily clay minerals and silt-sized quartz)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Ferruginous Sandstone

Sandstone, Iron-rich

Amazonite

Amazonite (KAlSi3O8)

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Rhodonite

Manganese Silicate (Mn, Fe, Mg, Ca)SiO3

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Banded Quartzite

Quartzite (SiO2 with impurities)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Tiger's Eye (dark/grey variant)

Pseudomorph of Quartz after Crocidolite (SiO2)

Schorl (Black Tourmaline) in Matrix

Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Moonstone (Feldspar)

Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)

Tiger's Eye

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Fossilized Gastropod (Snail)

Class Gastropoda (internal mold or 'steinkern')

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Red Sandstone

Arenite (primarily Quartz and Feldspar with Iron Oxide cement)

Ferruginous Sandstone Pebble

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)

Petrified Wood

Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)

Red Sandstone (Siltstone/Mudstone variety)

Ferruginous Sandstone (composed primarily of Quartz with Hematite cementation)

Soapstone

Steatite (composed primarily of Talc, Mg3Si4O10(OH)2)

Epidosite (Epidote-rich rock)

Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))

Laterite (iron-rich nodule, possibly Bauxite as a subtype)

Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)

Pebble (river rock/beach pebble)

Pebble (clast size class)

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions