Mineral (Man Enhanced)

Tumbled carnelian

Carnelian, orange-red variety of cryptocrystalline chalcedony (SiO₂)

Blue-green mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Goethite

Goethite (α-FeO(OH))

Tumbled blue-gray chalcedony (likely blue agate)

Chalcedony, microcrystalline quartz (SiO₂)

Quartz (White/Milky Pebble)

Silicon Dioxide (SiO2)

Likely serpentinized ultramafic rock (serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, possibly with magnetite, chromite, and brucite

Quartz cluster, possibly druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain

Limonite with Hematite

Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Likely slate fragment

Slate; fine-grained foliated metamorphic rock, commonly quartz–mica–chlorite rich

Diamond

Carbon (C) - Native Element

Likely milky quartz fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide or mica inclusions

Vesicular basalt (likely weathered lava rock)

Vesicular basalt; primarily plagioclase feldspar, pyroxene, and volcanic glass, with possible iron-oxide alteration

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Rough Apatite in Matrix

Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Serpentine

Antigorite, Lizardite, or Chrysotile; (Mg, Fe)3Si2O5(OH)4

Rock crystal quartz fragment

Quartz (silicon dioxide, SiO₂)

Emerald

Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities

Azurite–malachite-bearing copper ore

Azurite (Cu₃(CO₃)₂(OH)₂) with malachite (Cu₂CO₃(OH)₂), in a copper-rich host rock

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Quartz with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with inclusions

Honey calcite (likely)

Calcite — calcium carbonate, CaCO₃

Greenish Metamorphic Rock (likely containing epidote or chlorite)

Metamorphic rock, possibly epidosite or greenstone

Weathered serpentinite (likely)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, carbonate, and chromite

Quartz Vein in Rhyolite

Silicon Dioxide (SiO2) in extrusive igneous rock

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz vein rock with iron-stained matrix

Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Quartz-rich metamorphic rock, likely quartzite

Quartzite (mostly microcrystalline quartz, SiO₂), possibly mica-bearing

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile serpentine-group minerals

Granite

Phaneritic plutonic rock (SiO2 rich)

Gneiss

Gneiss

Dark volcanic rock, likely basalt

Basalt; primarily plagioclase feldspar and pyroxene, with possible olivine and alteration minerals

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Dyed or color-enhanced agate/microcrystalline quartz bead

Chalcedony (microcrystalline SiO₂), likely agate

Blue-green raw mineral specimen, likely apatite

Fluorapatite, Ca₅(PO₄)₃F (probable; visual identification only)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Granite (likely biotite granite)

Coarse-grained felsic plutonic rock: quartz + feldspar + biotite; approximate composition SiO₂-rich

Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite/Riebeckite

Black Obsidian

Volcanic Glass (predominantly SiO2)

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; predominantly quartz (SiO₂) and feldspar, with possible mica and iron-oxide staining

Likely tumbled basalt or vesicular volcanic rock

Basalt, possibly amygdaloidal basalt

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, olivine, pyroxene, and sulfides