Mixed (Predominantly Sedimentary And Igneous)

Peridotite / Olivine-rich Xenolith

Ultramafic igneous rock (predominantly olivine and pyroxene)

Pyrite-bearing sulfide ore (likely pyrite with iron oxides)

Pyrite, FeS₂, possibly mixed with limonite/goethite and other sulfides

Unakite

Unakite (metamorphosed granite)

Lepidolite in Quartz

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 / SiO2

Azurite-Malachite with Limonite

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

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)

Weathered fossiliferous limestone

Calcitic limestone; predominantly CaCO₃, possibly containing a fossil mold or shell fragment

Tumbled yellow-orange jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Amazonite

Amazonite / Microcline (KAlSi3O8)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Ooids (Oolites)

Ooids (composed of Calcium Carbonate / CaCO3)

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2) with Iron Oxide impurities

Tan Brown Granite

Phaneritic Biotite-Feldspar Granite

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Chrysocolla in Quartz

Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Heliotrope (Bloodstone) Sphere

Cryptocrystalline Quartz (SiO2 with Iron Oxide inclusions)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Sandstone

Sedimentary Rock (Quartz arenite)

Citrine

Silicon dioxide (SiO2)

Amethyst

Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)

Granite

Intrusive Igneous Rock

Pegmatitic pink feldspar–quartz rock

Granitic pegmatite; chiefly microcline/orthoclase feldspar (KAlSi₃O₈), quartz (SiO₂), and minor mica

Gabbro

Gabbro (mafic intrusive igneous rock)

Siltstone Pebble with Veining

Siltstone

Blue Chalcedony

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone Pebble

Sedimentary Clastic Rock (Quartz Arenite)

Weathered volcanic rock, likely vesicular basalt or scoria

Basaltic volcanic rock; predominantly plagioclase, pyroxene, and possibly olivine with iron-oxide weathering

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

Quartz with Chalcopyrite and Pyrite

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Weathered Sandstone / Quartzite

Quartz Arenite

Unakite

Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz

Polished ruby-in-fuchsite (tentative)

Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist

Unakite

Altered Granite (Epidotized Granite)

Orca Agate

Chalcedony (SiO2) with various inclusions

Nuummite

Antophyllite-Gedrite Orthoamphibole (Mg,Fe)7Si8O22(OH)2

Tumbled black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

Polished black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

Weathered granite cobble

Granite; predominantly quartz, feldspar, and mica

Granite countertop with a small pale mineral fragment

Granite; predominantly quartz, feldspar, and mica