Mineralological Variety

Beach Pebbles and Jasper

Quartz / Microcrystalline Silicon Dioxide (SiO2)

Ocean Jasper or Orbicular Jasper

SiO2

Tumbled carnelian agate

Carnelian, a reddish-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Gypsum (Satin Spar / Alabaster variety)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Polished orange jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Light-colored agate (likely chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image

Polished brecciated jasper

Microcrystalline quartz (SiO₂), likely iron-oxide-rich jasper

Mixed Rock Collection

Polylithic Geological Specimen Mix

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Red jasper (probable)

Jasper, an opaque microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides

Amethyst (rough crystal)

Quartz, SiO₂; purple coloration typically results from trace iron and natural irradiation

Polished red garnet (likely almandine)

Almandine garnet, Fe₃Al₂(SiO₄)₃; identification from the photo is provisional

Red faceted gemstone, possibly ruby (identification uncertain)

Ruby, if natural: corundum (Al₂O₃) colored by chromium

Amethyst cluster

Quartz, SiO₂; purple coloration from trace iron and natural irradiation

Jasper

Chalcedony (SiO2)

Polished agate geode slice

Microcrystalline quartz (chalcedony), SiO₂

Tumbled blue-green stone, likely dyed agate

Agate (microcrystalline quartz, SiO₂); blue coloration may be artificial

Possible black tourmaline (schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Polished jasper pebble

Jasper (microcrystalline quartz, SiO₂)

Chert / Flint

Microcrystalline Quartz (SiO2)

Geode (Unopened)

Quartz/Chalcedony concretion

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), commonly called orbicular jasper or ocean jasper

Tumbled amber-colored chalcedony (likely carnelian)

Quartz, microcrystalline SiO₂; orange variety commonly called carnelian

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Polished brown agate (likely)

Microcrystalline quartz, SiO₂ (chalcedony; agate variety)

Tumbled jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Tumbled chalcedony or quartz-rich chert

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

Black tourmaline (schorl)

Schorl, a sodium–iron borosilicate: NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Amethyst (small rough crystal)

Quartz, SiO₂; purple color from trace iron and natural irradiation

Chert (likely flint)

Microcrystalline quartz (SiO₂)

Red garnet cabochon-style earrings

Likely almandine garnet (Fe₃Al₂(SiO₄)₃); the image alone cannot confirm the stone or whether it is natural or synthetic.

Polished jasper-like stone

Likely chalcedony (microcrystalline quartz, SiO₂), possibly brecciated jasper

Emerald (green gemstone) pendant

Emerald, green variety of beryl (Be₃Al₂Si₆O₁₈); stones appear to be faceted and set in jewelry

Amethyst (rough specimen)

Quartz, SiO₂; purple color commonly caused by iron-related defects and natural irradiation

Black Tourmaline

Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Amazonite

Microcline (KAlSi3O8)

Jasper

Microcrystalline Quartz (SiO2)

Blue Sapphire and Diamond (Set in Metal)

Corundum (Al2O3) and Diamond (C)

Jasper or Agate

Silicon dioxide (SiO2)

Milky Quartz Beads

SiO2 (Silicon Dioxide)