Sedimentary Rock (Possibly Composed Of Various Minerals)

Conglomerate

Conglomerate (SiO2 matrix with various lithic clasts)

Weathered schist or foliated metamorphic rock

Mica schist, possibly phyllite; exact identification requires a fresh surface and testing

Limestone

Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment

Limestone

Sedimentary rock composed mainly of calcite (CaCO3)

Limestone

Sedimentary rock composed mainly of calcite (CaCO3)

Limestone

Sedimentary rock primarily composed of Calcite (CaCO3)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, Chrysotile)

Greenstone / Serpentinite

Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)

Sandstone (likely Graywacke or Arkose)

Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)

Jasper

Microcrystalline quartz (SiO2)

Demantoid Garnet on Matrix

Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3

Quartz Druzy on Matrix (likely Agate or Jasper)

Silicon Dioxide (SiO2) with various mineral inclusions

Red Granite

Phaneritic Felsic Igneous Rock (Granite)

Likely weathered gray stone or chert fragment

Uncertain; possibly microcrystalline quartz (SiO₂)-rich chert

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Sand

Siliciclastic sediment / Quartz sand (SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Blue Quartz

Quartz (SiO2) with inclusions

Vesicular basalt (probable)

Basalt; chiefly plagioclase feldspar, clinopyroxene, and iron-rich minerals, with vesicles possibly lined by zeolites or calcite

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)

Silicon Dioxide (SiO2) with various inclusions

Quartz Druzy on Matrix

SiO2

Orbicular Rhyolite (Rainforest Jasper)

Orbicular Rhyolite

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2 with iron oxide cementation)

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Quartz

Silicon Dioxide (SiO2)

Unidentified weathered rock, possibly quartz-bearing granite or rhyolite

Indeterminate; likely quartz–feldspar-rich silicate rock

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Milky quartz-bearing rock

Quartz (SiO₂), likely massive milky quartz; possibly quartz-rich pegmatite

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

Polished blue chalcedony or glass-like quartz specimen

Chalcedony (microcrystalline SiO₂), possibly treated or synthetic; exact identification requires testing

Limestone

Calcareous sedimentary rock (CaCO3)

Breccia

Breccia (Clastic Sedimentary Rock)

Granite

Intrusive Igneous Rock (Felsic)

Dalmatian Stone

Dalmatian Stone (a peralkaline igneous rock consisting of Feldspar, Quartz, and Arfvedsonite)

Geode (Unopened)

Silicon dioxide with various inclusions (SiO2)

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)