Mineral In A Matrix (Likely Quartz Or Feldspar)

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Que Sera Stone (Llanite)

Rhyolite Porphyry with Blue Quartz and Feldspar

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Granite (Core Sample)

Phaneritic Felsic Igneous Rock (Granite)

Sapphirine in Magnesian Schist

Sapphirine: (Mg,Al)8(Al,Si)6O20

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Basalt with Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (primarily Plagioclase and Pyroxene)

Chalcedony with inclusions (Agate/Quartz)

Silicon Dioxide (SiO2)

Granitic Pegmatite

Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

Graywacke

Graywacke (immature sandstone)

Rough Quartz Crystal in Matrix

Silicon Dioxide (SiO2)

Schorl (Black Tourmaline) in Quartz or Feldspar Matrix

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite

Dalmatian Stone

Dalmatian Stone (a fine-grained igneous rock, often misidentified as Dalmatian Jasper)

Granite (Weathered)

Granitic intrusive rock

Vuggy Quartz on Matrix

Silicon Dioxide (SiO2)

Granite (weathered cobble)

Granite

Sunstone

Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Olivine

Olivine group (Mg, Fe)2SiO4

Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar)

Red Rhyolite Porphyry

Rhyolite (Porphyritic texture)

Amazonite

Amazonite (K(AlSi3O8))

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Fluorite-Gedrite in Quartz (Schist)

Fluorite (CaF2) with Gedrite in Quartz/Feldspar Matrix

Quartzite Pebble (with Iron Staining)

Quartzite (SiO2)

Copper-bearing Quartz (likely Malachite on Quartz matrix)

Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)

Granite

Granite (Mainly Quartz, Feldspar, and Mica)

Granite

Phaneritic plutonic rock (SiO2 range 70-75%)

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Sandstone (likely Arkose)

Arenite (Feldspathic Sandstone / Arkose)

Greywhacke (River Pebble)

Graywacke (immature sandstone)

Granite

Granite (Felsic Plutonic Rock)

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Granite (Weathered)

Phaneritic Felsic Igneous Rock

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Graywacke

Graywacke/Lithic Sandstone

Granite Pebble

Intrusive Felsic Igneous Rock (primarily SiO2 with Al2O3, K2O, Na2O)