Mineral (Man Modified)

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂), likely ordinary or smoky quartz

Green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Quartz-rich rock, possibly quartz vein material

Likely milky quartz with iron-stained or weathered host rock; exact identification is uncertain from the photo

White quartz geode

Quartz geode; predominantly microcrystalline and drusy SiO₂

Serpentine-rich greenstone

Serpentinite, commonly dominated by serpentine-group minerals (antigorite, lizardite, chrysotile)

Limonite (Iron Ore)

Limonite (mixed iron hydroxides, primarily FeO(OH)·nH2O)

Weathered iron-rich mineral concretion

Likely limonite/goethite concretion (hydrated iron oxides), possibly a weathered ironstone fragment

Chrysocolla-rich copper ore

Chrysocolla, a hydrated copper silicate; composition is variable and commonly mixed with quartz or copper oxides

Tumbled pinkish quartz pebble

Quartz, silicon dioxide (SiO₂), likely rose quartz or iron-stained milky quartz

Peacock Ore

Bornite (Cu5FeS4)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Likely weathered sandstone or iron-rich shale

Quartz-rich sandstone, possibly ferruginous sandstone; exact identification requires testing

Limonite (Limonitic Sandstone)

Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)

Polished black gemstone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich amorphous SiO₂

Tumbled milky quartz

Quartz (SiO₂), likely translucent white variety

Biotite-rich granite or granitic pegmatite

Coarse-grained granite, likely containing quartz, feldspar, and biotite mica

Hematite (Iron Ore)

Hematite (Fe2O3)

Likely banded gneiss

Quartz–feldspar–mica gneiss (tentative visual identification)

Serpentinite (serpentinized ultramafic rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with magnetite, brucite, and residual olivine/pyroxene

Petrified wood (possible)

Silicified wood; commonly quartz or chalcedony replacing wood

Weathered vesicular volcanic rock, likely basaltic scoria

Vesicular basalt/scoria; mainly plagioclase, pyroxene, and iron-rich glass or oxides

Quartz

Silicon Dioxide (SiO2)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky or druzy quartz

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Milky quartz

Quartz, silicon dioxide (SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz fragments

Quartz (silicon dioxide, SiO₂)

Likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz-rich matrix; exact identification is uncertain from the image.

Metallic sulfide ore, possibly pyrite-rich

Pyrite (FeS₂), potentially mixed with chalcopyrite, galena, or iron oxides

Polished septarian nodule

Septarian concretion, commonly calcite-filled mudstone (calcite CaCO₃, aragonite, barite, and clay minerals)

Milky quartz cluster

Quartz, silicon dioxide (SiO₂)

Rose quartz (rough fragment)

Quartz, SiO₂; pink coloration is commonly associated with trace elements and microscopic inclusions.

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Vesicular basalt pebble with pale mineral infill

Basalt, likely amygdaloidal basalt; vesicles may contain calcite, zeolite, or silica

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2) with iron impurities

Tumbled pale quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Small rough quartz crystal

Quartz, silicon dioxide (SiO₂)

Biotite mica

Biotite, a potassium–iron–magnesium phyllosilicate mica; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂

Milky Quartz

Silicon Dioxide (SiO2)

Weathered iron-stained quartzite or jasper

Quartzite dominated by quartz (SiO₂), with iron oxides/hydroxides such as hematite and limonite