Metamorphic Rock (Primarily Composed Of Minerals)

Amphibolite

Amphibolite

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Sandstone with Bedding Planes

Arenite (Sedimentary rock composed primarily of sand-sized minerals)

Dalmatian Jasper (or Dalmatian Stone)

Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)

Greenschist

Chlorite schist

Nuummite

Nuummite (complex silicate composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Dragon Blood Jasper

Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))

Dalmatian Jasper

Dalmatian Stone (not a true Jasper, primarily a Perthitic Feldspar with Arfvedsonite)

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Granite

Intrusive Igneous Rock

Unakite / Epidotized Granite

Metamorphic Granite (Epidote-Orthoclase-Quartz Rock)

Greenschist

Greenschist (chlorite-epidote schist)

Blue Chalcedony

Silicon Dioxide (SiO2)

Granite Cobble

Granite

Sandstone

Arenite (predominantly SiO2 with iron oxides)

Nuummite

Nuummite (mixture of Gedrite and Anthophyllite)

Sandstone (Red Sandstone / River Stone)

Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)

Diorite

Diorite (Intermediate intrusive igneous rock)

Unakite Epidote Granite

Unakite (Rock composed of Orthoclase, Epidote, and Quartz)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Siltstone with Sandstone Bands

Siltstone (composed of Quartz and Clay minerals)

Greenstone / altered mafic rock

Likely chlorite–actinolite schist or metabasalt; exact identification requires testing

Pegmatite

Igneous Pegmatite

Coal (Bituminous / Anthracite)

Organic Sedimentary Rock (Carbonaceous Rock)

Greenschist

Chlorite schist

Gravel and Sediment Sample

Mixed clastic sediment

Serpentinite pebble

Serpentinite, composed chiefly of serpentine-group minerals (lizardite, chrysotile, antigorite), with possible magnetite and chlorite

Schist (with Iron Oxide)

Mica Schist

Leopard Skin Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Gneiss (Granitic Gneiss)

Gneiss

Jasper and Quartz Breccia

Silicified Breccia / Microcrystalline Quartz

Biotite Schist

Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Granite / Arkosic Sandstone (Coarse Igneous or Sedimentary Aggregate)

Granite / Quartz-Feldspar Aggregate

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

Gneiss

Gneiss (High-grade metamorphic rock)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

Sandstone (River Cobble)

Sandstone (primarily composed of silica, SiO2)