Anthropogenic (Man Made Product Subject To Geological Processes)

Greenschist

Greenschist facies rock

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Coal (most likely Bituminous or Anthracite)

Bituminous Coal (Grade of Coal), Anthracite (Grade of Coal)

Chalk

CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Quartz (River-worn Pebble)

Quartz (SiO2)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Quartz

Silicon Dioxide (SiO2)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Quartzite

Quartzite (primarily composed of SiO O₂)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Banded Gneiss

Gneiss (pronounced 'nice')

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

White Jade (Nephrite)

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

Marble

Metamorphosed Limestone/Dolomite

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Pumice

Pumice (volcanic rock)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Dog (Sleeping)

Canis familiaris (or Canis lupus familiaris)

Cullet Glass / Slag Glass

Amorphous silica glass

Opalite

Synthetic glass / Opaque silicious glass

Opalite

Synthetic Glass (Simulated Opal)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Opalite Egg

Synthetic Glass (Simulated Opal)

Opalite

Synthetic Glass (SiO2 + impurities)

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Opalite

Synthetic Opalised Glass

Calcite

Calcium Carbonate (CaCO3)

Coquina

Bioclastic Limestone

Slate

Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)

Weathered iron-rich rock, possibly limonite/goethite or ironstone

Limonite (hydrated iron oxides; commonly goethite, FeO(OH), with hematite and/or magnetite)

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)

Quartz–feldspar–mica rock; exact identification requires testing

Phyllite (possibly low-grade greenish slate)

Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Greenstone (likely serpentinite or greenstone pebble)

Serpentinite-rich ultramafic rock; commonly dominated by serpentine-group minerals, with possible chlorite, actinolite, or magnetite

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image