Mineralogical

Weathered iron-rich sandstone or ironstone

Ferruginous sandstone, likely limonite/goethite-cemented quartz arenite

Polished red jasper cabochon

Jasper; microcrystalline quartz (SiO₂) with iron-oxide impurities

Iron-rich concretion or weathered ironstone nodule

Goethite–hematite-rich limonite concretion (tentative)

Likely metallic meteorite fragment

Undetermined iron or stony-iron meteorite; mineralogy requires testing

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Chrysoprase- or serpentine-bearing quartz vein with pyrite

Quartz (SiO₂) with iron sulfide, chiefly pyrite (FeS₂), in altered Mg-rich rock; green material may be serpentine or nickel-bearing chalcedony

Conglomeratic breccia (possibly polymictic volcanic breccia)

Polymictic breccia; clasts in a fine-grained volcanic or sedimentary matrix

Fossilized bivalve shell

Bivalvia indeterminate; likely a preserved clam or cockle shell, composed mainly of calcium carbonate (CaCO₃)

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Iron-rich weathered rock, possibly limonite/goethite-bearing ore

Limonite (hydrated iron oxides; chiefly goethite, FeO(OH), with hematite and other oxides possible)

Orbicular basalt (amygdaloidal basalt)

Basalt, commonly with iron-oxide–stained amygdules; matrix chiefly plagioclase, pyroxene, and often olivine

Hypersthene

(Mg,Fe)SiO3 - Enstatite-Ferrosilite series

Weathered quartz-rich rock, possibly chert or quartzite

Indeterminate; likely microcrystalline quartz (SiO₂), possibly quartzite or chert

Granite

Felsic intrusive igneous rock

Sea stack

Likely resistant basaltic to andesitic volcanic rock

Granite

Granite

Ocean Jasper (Orbicular Jasper)

Silica (SiO2) with varied mineral inclusions

Chert (specifically Silex or Flint)

Microcrystalline Quartz (SiO2)

Rounded iron-rich concretion or weathered lateritic pebble

Goethite/hematite-bearing ferruginous concretion; exact mineralogy requires testing

Concretion (likely iron-rich sandstone or claystone concretion)

Diagenetic carbonate/iron-oxide concretion; exact mineralogy requires testing

Desert Rose Fragment (Atypical) / Weathered Chert

Silicon Dioxide (SiO2) or Barium Sulfate (BaSO4) depending on exact mineralogy

Banded Gneiss

Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous quartz–feldspar metamorphic rock; exact mineralogy requires testing

Banded greenstone or altered basalt

Chlorite–epidote amphibolite/greenstone; exact identification requires testing

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Banded River Rock / Gneiss (highly weathered)

Gneiss

Flagstone, likely weathered sandstone or limestone

Layered clastic carbonate rock; exact mineralogy cannot be confirmed from the image

Porphyritic Rhyolite or Andesite (Porphyry)

Porphyritic igneous rock (Composition depends on exact mineralogy, often Rhyolite or Andesite)

Polished banded gneiss pebble

Gneiss, chiefly quartz–feldspar–mica; exact mineralogy uncertain from image

Likely small metallic meteorite fragments

Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Gneiss

Gneiss (a type of metamorphic rock)

Weathered sandstone or siltstone

Clastic sedimentary rock, likely quartz-rich sandstone; exact mineralogy requires testing

Polished pale stone, likely limestone or quartzite pebble

Most consistent with micritic limestone (calcite, CaCO₃), though the image cannot confirm mineralogy

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Iron-rich meteorite candidate

Undetermined stony-iron or iron meteorite; mineralogy likely Fe–Ni metal with silicates

Breccia (likely volcanic or impact breccia)

Polymictic breccia; clasts in a fine-grained silicate matrix, exact mineralogy indeterminate from image

Tumbled dark gray stone, possibly basalt or andesite

Fine-grained mafic to intermediate volcanic rock; exact mineralogy cannot be confirmed from the photograph

Weathered iron-rich metamorphic rock, possibly schist or metabasalt

Provisional identification: chlorite–quartz–feldspar schist or altered basalt; exact mineralogy requires testing

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)