Man Made Glass (Often Grouped With Minerals In Lapidary)

Olivine (Peridot)

Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4

River Cobble (likely Basalt or Metagraywacke)

Non-specific water-worn lithic fragment

Fossilized Coral (Petoskey Stone or Rugose Coral)

Antophyllum (Hexagonaria) or Scleractinia (CaCO3)

Sea Glass (Turquoise/Aqua)

Amorphous Silica (SiO2) with transition metal dopants

Green Calcite

Calcium Carbonate (CaCO3)

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Snowflake Obsidian

Vitreous Volcanic Glass (Siliceous Obsidian with Cristobalite inclusions)

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO₂)

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

Quartzite Pebble (River Rock)

Quartzite (SiO2)

Rhodonite

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

Rutilated Quartz

Quartz with Rutile inclusions (SiO2 with TiO2)

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Quartz with Chlorite or Hornblende inclusions

Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions

Green Tourmaline (Verdelite)

Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)

Chert (or possibly Flint)

SiO2 (Silicon Dioxide)

Blue Quartz (potentially Dumortierite-included)

Silicon Dioxide (SiO2) with inclusions

Jasper or Agate pendant

Silicon dioxide (SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Basalt

Basalt

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Potassium-Rich Silicate Clay (inferred from biological context)

Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)

Banded Quartz

Silicon Dioxide (SiO2)

Quartz with Mica inclusions (likely Iron-stained)

Silicon Dioxide (SiO2) with Phyllosilicates

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sagenitic Agate (with Goethite/Rutile inclusions)

Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron inclusions

Dragon Stone (Dragon Blood Jasper)

Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Chert (Cherty Limestone / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Garnet (likely Almandine or a blend)

Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.

Prase or Green Quartz

Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)

Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Greenstone (Amygdaloidal Basalt)

Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)

Honey Calcite

Calcium Carbonate (CaCO3)

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

Garden Quartz (Lodalite)

Silicon Dioxide (SiO2) with mineral inclusions

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)