Mineral (Metamorphic Pseudomorph)

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Marble

Metamorphosed Limestone (CaCO3)

Schist

Mica Schist

Unakite

Epidotized Granite

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Citrine

SiO2 (Silicon Dioxide)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

Garnet (Almandine or Pyrope)

Garnet group; (Fe,Mg)3Al2(SiO4)3

Mica Schist

Schist (Crystalline metamorphic rock)

Banded gneiss pebble

Biotite–quartz–feldspar gneiss (composition variable)

Weathered metamorphic rock, likely gneiss or schist

Indeterminate foliated silicate rock; commonly quartz–feldspar–mica assemblage

Greenstone

Greenschist (containing chlorite, epidote, and actinolite)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Greenschist

Greenschist (comprising Actinolite, Chlorite, and Epidote)

Greenschist

Chlorite schist

Banded Gneiss

Metamorphic Gneiss (High-grade regional metamorphism specimen)

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

Quartz with Magnetite or Schorl inclusion

Silicon Dioxide (SiO2) with Fe3O4 or NaFe3(Al6)(BO3)3Si6O18(OH)4

Mixed Rock Collection (Pebbles and Stones)

Various geological specimens

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Granular)

Silicon Dioxide (SiO2)

Gold-bearing Quartz

Quartz (SiO2) with associated pyrite or native gold

Milky Quartz

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Smoky Quartz

Silicon Dioxide (SiO2)

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Raw Corundum (Sapphire/Ruby variant)

Aluminum oxide (Al2O3)

Marble

Recrystallized Calcite (CaCO3)

Gneiss (or Granite Gneiss)

Metamorphic rock rich in quartz, feldspar, and biotite/amphibole

Quartz with Mica (Muscovite or Biotite)

Silicon Dioxide (SiO2) with Phyllosilicates

Feldspar

Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Quartz Pebble

Silicon Dioxide (SiO2)