Mineraloid

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous quartz–feldspar metamorphic rock; exact mineralogy requires testing

Dalmatian jasper (likely orbicular microgranite)

Quartz–feldspar–biotite/pyroxene microgranite; commonly marketed as Dalmatian jasper

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

Small rounded orange-brown stone, likely iron-stained quartzite or sandstone

Indeterminate; probable quartz-rich sandstone/quartzite with iron-oxide staining

Small rounded pebble

Indeterminate lithic grain; likely weathered sandstone, iron-stained quartz-rich rock, or a concretion

Granite

Granite (Phaneritic igneous rock)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)

Iron-stained quartz-rich rock, likely pegmatite or quartz vein fragment

Quartz (SiO₂) with feldspar, mica, and iron-oxide/hydroxide staining; possibly weathered granite pegmatite

Red Granite

Phaneritic Felsic Intrusive Igneous Rock (primarily K-feldspar, Quartz, and Biotite)

Red Granite

Phaneritic Plutonic Rock (High Potassium Feldspar)

Rhyolite

Extrusive Felsic Igneous Rock

Brown chert or flint pebble

Microcrystalline quartz (SiO₂), commonly with chalcedony and iron-oxide staining

Weathered iron-rich sandstone or ironstone

Ferruginous sandstone, likely limonite/goethite-cemented quartz arenite

Polished purple chalcedony (likely lavender agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally iron- or manganese-colored

Iron-rich concretion or weathered ironstone nodule

Goethite–hematite-rich limonite concretion (tentative)

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, potentially granitic or quartzitic material

Weathered mineralized rock fragment

Indeterminate; likely quartz–feldspar-rich lithic material with iron-oxide staining

Iron-rich weathered stone, possibly hematite-rich ironstone

Hematite/goethite-bearing ironstone; predominantly Fe₂O₃ and FeO(OH)

Rhodonite-bearing metamorphic rock

Manganese-rich metamorphic rock, chiefly rhodonite (MnSiO₃), with quartz and manganese oxides

Weathered granite pebble

Granite, chiefly quartz (SiO₂), feldspar, and mica/amphibole

Quartzite

Quartzite (SiO2)

Tumbled chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert

Painted Garden Rock

Coated Siltstone or Mudstone

Fossilized bivalve shell

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

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

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

Weathered iron-rich volcanic rock

Likely altered basalt or andesite with iron-oxide staining

Sandstone Concretion

Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)

Diorite

Diorite (an intermediate intrusive igneous rock)

Brick

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

Porphyritic Rhyolite or Andesite (Porphyry)

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

Likely small metallic meteorite fragments

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

Granite

Felsic intrusive igneous rock

Sea stack

Likely resistant basaltic to andesitic volcanic rock

Granite

Granite

Granite

Phaneritic Igneous Rock (Granite)

Granite

Intrusive Phaneritic Felsic Igneous Rock

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Flint or chert flake

Microcrystalline quartz (SiO₂), commonly chert/flint

Eclogite

Eclogite (Omphacite + Almandine-Pyrope Garnet)

Tumbled orange chalcedony and a gray stone disk

Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate

Limonite (Ironstone Concretion)

Limonite (Hydrous Ferric Oxides mixed with Goethite)