Mineral (Man Modified)

Painted Garden Rock

Coated Siltstone or Mudstone

Malachite-bearing copper ore

Malachite, Cu₂CO₃(OH)₂, likely mixed with chrysocolla, copper minerals, and iron oxides

Quartz (White/Milky Pebble)

Silicon Dioxide (SiO2)

Rounded quartz-rich pebble

Massive quartz (silicon dioxide, SiO₂), possibly milky quartz or quartzite

Milky quartz

Quartz (silicon dioxide, SiO₂)

Likely iron-rich volcanic rock (weathered basalt or andesite)

Indeterminate, probably weathered basalt/andesite with iron-oxide staining

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Diamond

Carbon (C) - Native Element

Rounded gray-green rock, likely gneiss

Gneiss (tentative; mineral composition and texture cannot be confirmed from the image)

Milky quartz with dark mineral inclusions

Quartz, SiO₂; dark inclusions are not identifiable from the image

Druzy quartz geode fragment

Quartz, SiO₂, with a coating of fine drusy crystals

Polished bumblebee jasper bead

Bumblebee jasper (trade name); chiefly calcite, aragonite, and pyrite, with variable realgar/orpiment and other minerals

Small dark mineral fragment

Undetermined; image lacks diagnostic detail for reliable identification

Unidentified pink-and-green mineral-bearing rock

Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral

Likely raw quartz crystal fragment

Quartz (SiO₂), identification tentative from the image

Likely gray-green metamorphic rock fragment

Unidentified fine-grained metamorphic rock; exact identification is not possible from this small image

Quartz-rich rock, possibly milky quartz with iron staining

Predominantly quartz (SiO₂); exact rock type cannot be confirmed visually

Pink feldspar (likely orthoclase)

Orthoclase, KAlSi₃O₈

Blue-green mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Ironstone (iron-oxide-rich rock)

Ironstone, composed mainly of hematite (Fe₂O₃) and/or goethite (FeO(OH)); exact minerals cannot be confirmed visually

Rounded, banded metamorphic cobble

Likely gneiss or foliated quartz-rich metamorphic rock; exact identification is uncertain from the photograph.

Small gray-green tumbled stone, likely serpentine

Serpentine-group minerals, approximately Mg₃Si₂O₅(OH)₄; identification is uncertain from the image alone

Tumbled blue-gray chalcedony (likely blue agate)

Chalcedony, microcrystalline quartz (SiO₂)

Small brown mineral/rock fragment

Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz cluster, possibly druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain

Tumbled white stone, likely milky quartz

Quartz (SiO₂), probable; exact identification cannot be confirmed visually

Dark mafic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine or iron oxides

Native American Hammerstone / Pitted Stone

Modified lithic artifact (often quartzite, basalt, or granite)

Likely slate fragment

Slate; fine-grained foliated metamorphic rock, commonly quartz–mica–chlorite rich

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Polished druzy quartz specimen

Quartz (SiO₂), likely druzy quartz with possible blue chalcedony or inclusions

Limonite with Hematite

Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Quartz-rich hydrothermal mineral specimen, possibly vanadinite-bearing matrix

Quartz (SiO₂) with unidentified red-brown accessory minerals; exact species requires testing

Likely weathered granite or granitic gneiss fragments

Granite: quartz–feldspar–mica aggregate; possibly biotite granite or weakly foliated gneiss

Small amber-colored mineral fragment (identity uncertain)

Undetermined; appearance alone is insufficient for a reliable mineral identification

Water-worn pebble, likely fine-grained volcanic rock

Unidentified mafic volcanic rock; possibly andesite or basalt

Polished dendritic agate or jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese oxide and possibly calcite veins

Bronze or iron-age decorated pottery sherd

Archaeological ceramic fragment; likely fired clay with impressed or molded decoration, not a natural rock

Dark gray crystalline rock, possibly basalt

Basalt (tentative; plagioclase–pyroxene–iron oxide assemblage)

White quartz pebbles

Quartz, SiO₂ (likely milky quartz)

Ironstone concretion (possibly a pyrite-bearing concretion)

Iron-oxide-cemented sedimentary concretion; exact mineral composition cannot be confirmed from the photograph