Organic Material (Likely A Fruit Or Berry)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Carnelian (red chalcedony), possibly red agate or jasper

Chalcedony, a microcrystalline variety of quartz; silicon dioxide (SiO₂), commonly colored red-orange by iron oxides. The specimen may include opaque jasper or agate zones.

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.

Quartz (likely milky quartz or a stained variety)

Silicon Dioxide (SiO₂)

Shale

Shale (clastic sedimentary rock)

Petrified Wood

Silicified wood, primarily composed of Quartz (SiO2)

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Polished black-and-white banded stone, likely tourmalinated quartz or zebra jasper

Quartz (SiO₂) with black tourmaline (schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄), or quartz-rich zebra jasper

Pyrite

Pyrite (Iron Disulfide), FeS2

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Chert or Flint (polished/water-worn)

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

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Tumbled red jasper and blue-green turquoise (likely dyed or stabilized)

Red jasper: microcrystalline quartz, SiO₂, colored by iron oxides; turquoise: hydrated copper-aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue-green copper mineral specimen, likely chrysocolla-bearing rock

Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with malachite or chrysocolla matrix

Weathered granite cobble

Granite (quartz–feldspar–mica rock; commonly containing quartz, K-feldspar, plagioclase, and biotite)

Pearls

Aragonite (calcium carbonate) and Conchiolin

Jasper (likely a variety of Brecciated Jasper or a patterned variety)

Silicon dioxide (SiO2)

Weathered, iron-stained rhyolite pebble (possibly rhyolitic volcanic breccia)

Rhyolite, a felsic volcanic rock; mainly quartz and alkali feldspar with minor plagioclase, altered mafic minerals, and iron-oxide staining

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Amber

Amber (Fossilized Tree Resin)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Banded gneiss, probably granitic gneiss

Foliated gneiss composed mainly of quartz (SiO₂), feldspar—orthoclase/microcline and plagioclase—and dark mica, commonly biotite K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Goldstone (Red)

Aventurine Glass

Amber

Fossilized Tree Resin (Amorphous Hydrocarbon)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Quartz

SiO₂ (Silicon Dioxide)

Sapphire (likely blue synthetic sapphire or blue glass in a ring)

Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.

Blue-green copper mineral specimen, likely chrysocolla or turquoise

Probable chrysocolla, hydrated copper phyllosilicate (Cu₂H₂Si₂O₅(OH)₄·nH₂O); turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, is an alternative

Quartz-rich hydrothermal ore rock, likely gold-bearing quartz vein

Milky quartz (SiO₂) with iron-oxide staining and probable sulfide minerals; host rock may be schist or altered granite

Pale green tumbled mineral fragment, likely serpentine or green calcite

Probable serpentine-group mineral (Mg3Si2O5(OH)4) or, less likely, calcite (CaCO3); identification is uncertain from the photograph

Polished white agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony/agate with iron-oxide staining or a brown mineral inclusion

Quartz

Quartz (SiO2 - Silicon Dioxide)

Weathered pegmatite or feldspar-rich granite fragment

Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph

Quartz (in a rock matrix)

Quartz (SiO2)

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Agate

Agate (a cryptocrystalline variety of Quartz, SiO₂)

Tumbled carnelian agate with dark mineral inclusions

Carnelian, an orange variety of microcrystalline quartz (chalcedony), SiO₂; dark inclusions are likely iron oxides/hydroxides, possibly hematite, goethite, or a basaltic/matrix fragment

Greisen (Quartz-Muscovite-Turretine Rock)

Greisen

Amber (Black)

Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)