Metamorphic (Likely Gneiss Or Schist Based On Texture)

Serpentinite (likely)

Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)

Chert (with Calcite Veining)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) veins

Magnesite or Howlite (dyed or naturally patterned)

Magnesium carbonate (MgCO3) or Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Granite (Pink/Potassium-rich)

Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Rounded white pebble, likely quartz or feldspar

Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image

Possible iron-rich basalt or industrial slag

Basalt, likely Fe–Mg silicate rock; exact identification is uncertain from the blurred image

Mica-bearing quartz rock (likely pegmatite)

Quartz–feldspar–mica pegmatite; dark mica is probably biotite, possibly muscovite or chlorite

Pegmatite with muscovite mica

Granitic pegmatite; quartz (SiO₂), feldspar, and muscovite (KAl₂(AlSi₃O₁₀)(OH)₂), locally biotite/tourmaline

Basalt River Pebble

Basalt (Extrusive Igneous Rock)

Chert (Jasper/Agate mix)

Microcrystalline Quartz (SiO2)

Quartz geode (likely druzy quartz)

Quartz, silicon dioxide (SiO₂)

Chalcedony (Agate/Chert)

Microcrystalline Quartz (SiO2)

Banded Agate (specifically Moss Agate or Plume Agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Amygdaloidal Basalt with Quartz

Basalt (SiO2 inclusion)

Sandstone (Ferruginous)

Arenite (Fe2O3 rich)

Quartz Veined Basalt

Mafic Igneous Rock with Quartz (SiO2) intrusion

Polished orbicular/porphyritic granite or breccia

Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image

Sandstone (Quartz-rich)

Clastic sedimentary rock (SiO2 primary)

Quartz / Limestone Gravel

SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)

Limestone with Calcite Crust

Sedimentary Calcium Carbonate (CaCO3)

Basalt Pebble

Basalt (Mafic Extrusive Volcanic Rock)

Porphyritic Andesite/Basalt or Diorite River Rock

Porphyritic Igneous Rock

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Metallic sulfide mineral specimen, likely pyrite

Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate

Unidentified dark pebble

Undetermined; possibly polished basalt, chert, or iron-rich stone

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Quartzite Cobble

Quartzite (SiO2)

Sandstone (River Pebble)

Clastic Sedimentary Rock (primarily Quartz)

Milky quartz with iron-oxide staining

Quartz (silicon dioxide, SiO₂)

Amazonite

Microcline (KAlSi3O8 variant)

Basalt Pebble

Basalt

Limestone with Algal/Lichen Colonization

Calcium Carbonate (CaCO3)

Mixed rock and mineral specimen collection

Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Likely slag or metallic industrial byproduct

Unidentified iron-rich ferrous slag; possibly magnetite-bearing slag