Mineral (Man Modified)

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions

Likely quartz-rich rocks

Possibly massive quartz (SiO₂); the photo is insufficient for a confident identification.

Druzy amethyst (likely)

Quartz, SiO₂, with purple coloration from trace iron and irradiation

Small polished gemstone chips, likely mixed quartz varieties

Quartz (SiO₂), possibly including smoky quartz and other varieties; exact identification is uncertain from the image

Polished septarian nodule

Septarian concretion (calcite-filled mudstone, commonly with aragonite and barite)

Cave (botryoidal) aragonite or calcite specimen

Aragonite (CaCO₃), possibly mixed with calcite and iron-oxide inclusions

Weathered serpentinite (likely)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, carbonate, and chromite

Tumbled green stone, likely serpentine

Serpentine-group minerals, commonly antigorite or lizardite; approximate composition Mg₃Si₂O₅(OH)₄

Tumbled milky quartz (likely quartz with a dark mineral inclusion)

Quartz, silicon dioxide (SiO₂), with an unidentified dark inclusion

Weathered ironstone pebble (likely ferruginous concretion)

Iron-oxide-cemented concretion, commonly hematite (Fe₂O₃) and/or goethite (FeO(OH))

Tumbled milky quartz pebble

Quartz, SiO₂

Polished bumblebee jasper (likely calcite–orpiment/realgar material)

Calcite (CaCO₃) with sulfur-bearing sulfides, commonly marketed as “bumblebee jasper”

Dendritic limestone or marble slab

Manganese-oxide dendrites in carbonate rock, likely calcite (CaCO₃)

Native Copper

Native Copper (Cu)

Quartz-rich crystalline rock, likely drusy quartz on matrix

Quartz (SiO₂), possibly intergrown with calcite or feldspar matrix

Tumbled yellow chalcedony (likely yellow jasper or quartz)

Microcrystalline quartz, SiO₂; probable chalcedony/jasper variety

Hornblende-bearing metamorphic rock (probable amphibolite)

Amphibolite; chiefly hornblende amphibole and plagioclase feldspar

Druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline-to-fine crystalline drusy quartz

Druzy quartz fragment

Quartz, SiO₂, with a coating of tiny quartz crystals

Quartz-rich rock, likely milky quartz vein material

Predominantly quartz (SiO₂), with possible iron-oxide staining or minor feldspar

Likely vesicular basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and sometimes olivine

Quartz-rich metamorphic rock, likely quartzite

Quartzite (mostly microcrystalline quartz, SiO₂), possibly mica-bearing

Jade (likely Jadeite or Nephrite)

Jadeite (NaAlSi2O6) or Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Druzy quartz specimen

Quartz, SiO₂, with possible iron-oxide staining and minor associated minerals

Red vesicular volcanic rock, likely scoria

Scoria (mafic pyroclastic rock), typically basaltic and composed mainly of plagioclase, pyroxene, and iron-rich glass

Banded green stone, likely serpentinite

Serpentinite (rock composed chiefly of serpentine-group minerals; exact identification requires testing)

Fossil gastropod shell

Fossilized marine gastropod; exact genus/species cannot be determined from the image

Small translucent quartz fragment

Quartz (SiO₂), identification tentative from the image

Blue-dyed howlite beads (likely)

Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise

Small dark rock fragment (unidentified)

Undetermined; the image does not show enough detail for reliable identification.

Likely galena-bearing ore or metallic sulfide rock

Possibly galena (PbS) with associated sulfide minerals; exact identification cannot be confirmed visually

Yellow Quartz

Silicon Dioxide (SiO2)

Clear Calcite

Calcite (Calcium Carbonate, CaCO3)

Blue-green fluorite (rough crystal)

Fluorite, calcium fluoride (CaF₂)

Iron-stained quartz vein in host rock

Quartz (SiO₂), with iron-oxide staining; host rock is uncertain from the image

Polished dendritic opal or common opal

Opal, hydrated amorphous silica (SiO₂·nH₂O), likely dendritic common opal

Milky quartz

Quartz, silicon dioxide (SiO₂)

Rounded green-gray pebble, likely serpentinite

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite

Rounded iron-rich pebble

Likely ironstone or ferruginous quartzite; exact identification requires testing

Likely fluorite fragments

Fluorite (calcium fluoride, CaF₂)

Uncertain translucent mineral specimen, possibly calcite

Calcite (calcium carbonate, CaCO₃), tentative identification

Likely galena (lead sulfide)

Galena, PbS