Sedimentary And Igneous

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Biotite–muscovite schist (mica schist)

Mica schist, likely quartz–feldspar–biotite ± muscovite; exact minerals cannot be confirmed from the photo

Foliated metamorphic rock, likely schist or gneiss

Quartz–mica schist/gneiss; exact identification requires close examination of mineral grains

Likely mica schist

Mica-rich schist, likely muscovite/biotite with quartz and possibly feldspar

Mica-rich schist

Mica schist, likely muscovite–biotite schist with quartz

Small rounded pebble, likely quartz-rich sandstone or granitic fragment

Indeterminate lithic clast; possible quartz–feldspar aggregate

Quartz Geode

Silicon Dioxide (SiO2)

Geode

Quartz nodule / Chalcedony-lined cavity

Mica schist (likely biotite-rich schist)

Mica schist, composed chiefly of mica-group minerals (likely biotite) with quartz and feldspar

Likely mica-rich schist fragment

Mica schist; exact mineral identification is uncertain from the image

Mica-rich rock, likely mica schist

Mica schist, composed chiefly of muscovite and/or biotite with quartz and feldspar

Likely mica schist

Mica-rich schist, probably muscovite–biotite schist

Weathered mica-rich rock, likely mica schist

Mica schist, composed mainly of muscovite and/or biotite with quartz and feldspar

Mica schist (likely biotite–muscovite schist)

Mica schist; chiefly quartz and mica minerals (muscovite KAl₂(AlSi₃O₁₀)(OH)₂ and/or biotite)

Mica-rich metamorphic rock, likely biotite schist

Biotite–quartz schist; probable composition of quartz, biotite, feldspar, and minor sulfide or iron-oxide minerals

Quartz Geode / Druzy Quartz Node

Silicon Dioxide (SiO2)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous schist/gneiss; composition likely quartz, feldspar, mica, and altered mafic minerals

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

Fluorite with Quartz coating

Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Weathered schist or gneiss fragment

Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss

Fluorite

Calcium Fluoride (CaF2)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Mica-rich schist (likely biotite schist)

Mica schist, composed mainly of biotite and/or muscovite with quartz and feldspar

Likely mica schist

Mica-rich schist, probably biotite–quartz–feldspar schist

Weathered quartz-rich metamorphic rock, likely gneiss or quartzite

Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph

Geode with Quartz Crystals

SiO2 (Silicon Dioxide) in a geode formation

Fluorite

Calcium Fluoride (CaF2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Reddish-brown mica-rich schist (likely biotite schist)

Biotite schist; mica-rich metamorphic rock, commonly composed of biotite, quartz, and feldspar

Mica-rich schist (likely biotite schist)

Mica schist, composed mainly of quartz and mica (biotite and/or muscovite)

Foliated metamorphic cobble, likely gneiss

Biotite–quartz–feldspar gneiss (tentative)

Quartz-veined Metamorphic Pebble

Silicate-rich metamorphic rock with quartz veins (SiO2)

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Mica-rich schist (likely biotite–quartz schist)

Quartz–mica schist; chiefly quartz (SiO₂) with biotite and/or muscovite mica

Likely biotite-rich schist

Mica schist, likely containing biotite and quartz; exact identification requires examination

Mica-rich schist

Muscovite–quartz schist (tentative; image alone cannot confirm mineral composition)

Mica-rich schist (likely quartz-mica schist)

Quartz–mica schist, commonly containing muscovite and/or biotite with quartz and feldspar

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Unopened Geode

Geode (containing various mineralization like Quartz SiO2)

Foliated metamorphic rock (likely mica schist)

Mica schist, typically composed of quartz and mica (muscovite and/or biotite)

Weathered, garnet-bearing schist (tentative identification)

Mica schist, likely quartz–feldspar–mica schist; exact minerals cannot be confirmed from the photograph

Banded quartz-rich metamorphic rock (likely quartzite or quartz-mica schist)

Quartzite/schist composed chiefly of SiO₂ quartz with mica, feldspar, and iron-oxide or copper-colored accessory minerals