Mineral Side Rock

Concretion (Sandstone)

Sandstone Concretion

Sandstone

Arenite (SiO2 based)

Gneissic River Pebble

Gneiss

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Unakite

Epidotized Granite

Sedimentary Pebble (Sandstone)

Clastic Sedimentary Rock (SiO2 dominant)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Basalt

Basalt (Aphanitic mafic volcanic rock)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Citrine

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic Quartz-Feldspar rock)

Granite

Phaneritic Acidic Igneous Rock (Granite)

Chert (Septarian Concretion/Nodule)

Microcrystalline silica (SiO2) with carbonate mineral veining

Granite

Granite (a felsic intrusive igneous rock)

Ironstone Concretion (Coprolite-like)

Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))

Azurite and Malachite on Matrix

Cu3(CO3)2(OH)2 (Azurite) and Cu2CO3(OH)2 (Malachite)

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

Basalt

Mafic volcanic rock (various silicate minerals including Pyroxene and Plagioclase)

Quartz Geode

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate rock

Quartz (Iron-stained or Rose variant)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Granite Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Pink Granite Gneiss

Granitic Gneiss

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Basalt with Quartz/Feldspar Vein

Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone with Hematite staining

Arenite with Fe2O3 inclusions

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based clastic rock)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

Orbicular Granite

Orbicular Granidiorite / Plutonic Igneous Rock

Garnet Gneiss

Gneiss containing almandine-pyrope garnet