Metamorphic Rock (Primarily Composed Of Minerals)

Garnet Schist

Garnetiferous Mica Schist

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Aventurine

Quartz (Silicon Dioxide - SiO2) with inclusions of Mica

Sandstone

Arenite (SiO2 based)

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Plagioclase Feldspar (specifically Albite/Oligoclase)

(Na,Ca)(Si,Al)4O8

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Green Aventurine

Quartz variety (SiO2 with inclusions)

Stichtite in Serpentine (Atlantasite)

Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4

Quartzite with Garnet

Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Marble

Recrystallized Calcite Rock (CaCO3)

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Pyrite

Iron Sulfide (FeS2)

Quartzite River Rock with Dendrites

Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions

Green Aventurine

Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions

Chalcopyrite

Chalcopyrite (CuFeS2)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Pyrite

Iron Pyrite (FeS₂)

Quartz Geode

Silicon Dioxide (SiO2)

Olivine Basalt

Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)

Agate (Common Chalcedony)

Silicon Dioxide (SiO2)

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Beryl (Aquamarine) in Matrix with Schorl

Be3Al2Si6O18 (Beryl) with NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Pyrite

Pyrite (FeS2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate)

Lapis Lazuli

Lapis Lazuli (Complex metamorphic rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Lapis Lazuli (prominent blue specimen in collection)

Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)