Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Red Sandstone

Arenite (Fe2O3 rich)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Montana Moss Agate

Chalcedony (SiO2) with Manganese/Iron oxide inclusions

Brown Antique Granite

Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)

Sandstone Beach Pebble

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)

Unakite

Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Granodiorite or Diorite

Granodiorite / Diorite

Orange Calcite (likely polished specimen)

Calcite

River Cobble (Basaltic/Andesitic)

Mafic Igneous Porphyritic Rock

Porphyry (specifically Porphyritic Rhyolite or Andesite)

Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone

Arenite (composed primarily of SiO2)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (SiO2 based with various mineral cements)

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Red Quartzite Slipper Stone

Quartzite (SiO2)

Crazy Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Gneiss

Gneissic Metamorphic Rock

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Pink Granite

Phaneritic Felsic Igneous Plutonic Rock

Basalt

Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)

Gneiss

Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Gneiss (Pebble)

Gneiss

Giallo Ornamental Granite

Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)

Gneiss (likely)

Gneiss

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)

Dalmatian Stone

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