Sedimentary (Processed Mineral Product)

Quartz crystal pendant (likely smoky quartz or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium carbonate (CaCO3)

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Epidote

Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Milky quartz pebble

Quartz (SiO₂), commonly called milky quartz

Limestone

Limestone (Calcium Carbonate - CaCO3)

Bentonite Clay

Montmorillonite (Al2H2O12Si4)

Limestone

Calcium Carbonate (CaCO3)

Green Sea Glass

Man-made silicate glass (weathered)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Quartz with Tourmaline and Iron Staining

Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Serpentinite pebble

Serpentinite, composed chiefly of serpentine-group minerals (lizardite, chrysotile, antigorite), with possible magnetite and chlorite

Chert / Flint

Cryptocrystalline quartz (SiO2)

Weathered dark volcanic rock, likely basalt

Basalt (plagioclase–pyroxene ± olivine), tentative identification

Greenstone (likely serpentinite or greenstone pebble)

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

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Flint

SiO2 (Microcrystalline quartz / Chert)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Quartzite

Quartzite (primarily SiO2)

Sandstone Pebble

Sandstone (SiO2 rich clastic rock)

Weathered basalt or volcanic scoria fragment

Basaltic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich oxides

Faceted diamond gemstone (likely)

Diamond — crystalline carbon, C

Blue Kyanite

Kyanite (Al2SiO5)

Yellow Aventurine (Yellow Quartz)

Silicon Dioxide (SiO2) with inclusions of Muscovite or Mica

Weathered iron-rich rock fragment

Likely limonite/goethite-rich ironstone; exact identification requires testing

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Shale or Mudstone (Based on appearance)

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

Tumbled dark stone, likely basalt or basaltic rock

Fine-grained mafic volcanic rock; commonly basalt, composed chiefly of plagioclase and pyroxene with possible olivine and iron oxides

Amethyst and clear gemstone ring

Amethyst (purple quartz, SiO₂), likely set with colorless quartz or glass accents

Granite

Intrusive Felsic Igneous Rock

Green aventurine pendant

Quartz variety, SiO₂, colored mainly by fuchsite or other chromium-bearing mica inclusions

Raw Pink Salt (Himalayan Salt)

Halite (NaCl with trace minerals)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Magnetite (lodestone), possibly meteoritic iron

Magnetite, Fe₃O₄; exact identification is uncertain from the image alone

Tumbled blue-green stone, likely chrysoprase or dyed chalcedony

Cryptocrystalline quartz (SiO₂), possibly nickel-bearing chrysoprase; exact identification requires testing

Goldstone (blue/black aventurine glass)

Man-made aventurine glass; silica glass containing metallic copper or other glittering inclusions