Not A Rock (Man Made Origin)

Jasper

Silicon dioxide (SiO2)

River Stone (likely Quartzite or Chert)

Recrystallized Silicon Dioxide (SiO2)

Tiger's Eye

SiO2 (Silicon Dioxide with inclusions of Goethite/Limonite)

Jasper (Red/Yellow)

Silicon Dioxide (SiO2) with impurities

Chert (Jasper/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Tiger's Eye

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

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Gneiss (specifically a Banded Gneiss cobble)

Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)

Jasper

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Chert

Chert (variant of microcrystalline quartz)

Quartz Geode (partially opened)

Silicon Dioxide (SiO2) with iron staining

River Chalcedony / Agate

Chalcedony (Silicon Dioxide, SiO2)

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Stiped Slate Beach Pebble

Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)

Limestone

Calcium Carbonate (CaCO3)

N/A (The provided image is a storyboard/digital document)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Diabase (Dolerite) Cobble

Diabase / Dolerite

Basalt (River Pebble)

Basalt (dominated by Plagioclase Feldspar and Pyroxene)

Ferruginous Sandstone

Arenite with Hematite/Limonite cement

Conglomerate

Conglomerate (clastic sedimentary rock)

Vesicular Basalt (Lava Rock)

Aphanitic Mafic Igneous Rock

Porphyritic Basalt (Leopard Rock)

Porphyritic Mafic Volcanic Rock

Scoria (Red Lava Rock)

Scoria (Vesicular basaltic rock)

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Quartzite

Quartzite (SiO2 silicon dioxide)

Turquoise

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

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Basalt

Extrusive Mafic Igneous Rock (composed primarily of Plagioclase, Pyroxene, and Olivine)

Sandstone

Arenite (SiO2 based with mineral cement)

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Sandstone (Ferruginous)

Arenite (Fe-rich)

Chert (Jasper-bearing)

Chert (Silicon Dioxide, SiO2)

Quartzite

Quartzite (SiO2)

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)