Mixed (Sedimentary, Igneous, And Metamorphic)

Sapphirine in Magnesian Schist

Sapphirine: (Mg,Al)8(Al,Si)6O20

Quartz with Mica (Micaceous Quartz)

Silicon Dioxide (SiO2) with Phyllosilicates

Granite

Granite (a felsic intrusive igneous rock)

Chalcedony (Agate/Jasper mix in host rock)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Druzy Quartz (on Geode Fragment)

Silicon Dioxide (SiO2)

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Hematite (Iron Ore)

Hematite (Fe2O3)

Quartz Geode (Nodule)

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon dioxide (SiO2) - variety of Chalcedony

Garnet (likely Pyrope or Almandine)

Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.

Hematite

Hematite (Fe2O3)

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartz with Mica/Chlorite inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Red Jasper

Jasper (Silicon Dioxide with Iron inclusions - SiO2)

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Chert (or potentially massive Quartz/Quartzite)

SiO2 (Silicon Dioxide)

Black Obsidian and Hematite

Volcanic Glass (SiO2) and Hematite (Fe2O3)

Yellow Chalcedony (Carnelian/Yellow Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Blue-dyed Quartz Druzy

Silicon Dioxide (SiO2) with artificial pigment

Amethyst

Amethyst (SiO2 - Silicon Dioxide with iron impurities)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Carnelian Agate

Carnelian (Silicon Dioxide: SiO2) with iron oxide impurities

Blue Quartz (Dumortierite Quartz)

SiO2 with inclusions of AlAl6BSi3O18

Dumortierite Quartz

Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Dendritic Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions

Rhodonite

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Jade (likely Nephrite or Jadeite)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Ruby Fuchsite / Ruby in Fuchsite

Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix

Tiger's Eye and Carnelian Quartz

Silicon Dioxide (SiO2)

Green Tourmaline

Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4

Banded Agate (specifically Botryoidal/Orbicular Agate)

Silicon Dioxide (SiO2)

Granite

Granite

Quartz (milky quartz variety)

Quartz (SiO₂)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Gold (Processed)

Gold (Au)

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions