Metamorphic (Pseudo Igneous)

Magnetite with Quartz

Magnetite (Fe3O4)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)

Rounded quartz-rich pebble, likely milky quartz with iron-oxide inclusions

Quartz (SiO₂), possibly with minor chlorite or iron/manganese oxides

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Magnetite

Magnetite (Fe3O4)

Quartz geode or quartz-bearing rock

Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity

Tumbled quartz pebble, possibly citrine or pale smoky quartz

Quartz (SiO₂), likely microcrystalline/tumbled material

Gneiss with Quartz Vein

Metamorphic Gneiss

Weathered quartz-bearing rock, likely granite or granitic gneiss

Feldspar–quartz–mica aggregate; probable granite (compositionally, quartz + feldspar + biotite/muscovite)

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Magnetite-rich iron ore

Magnetite (Fe₃O₄), possibly massive magnetite/ironstone

Tumbled garnet (likely almandine)

Almandine garnet, iron-aluminum nesosilicate (Fe₃Al₂Si₃O₁₂)

Red corundum (ruby-colored polished crystal)

Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium

Foliated metamorphic rock, likely garnet-mica schist

Mica schist with probable garnet and quartz; exact identification requires testing

Unakite Epidote-Granite

Unakite (Epidotized Granite)

Quartz-rich metamorphic rock (probable quartzite)

Quartzite; predominantly crystalline SiO₂, with possible mica and iron-oxide impurities

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Likely dark mineral or rock fragment

Indeterminate from image; possibly a dark silicate mineral such as hornblende, biotite, or basalt

Black faceted gemstone, possibly black spinel or onyx

Undetermined; candidates include spinel (MgAl₂O₄) or chalcedony (SiO₂)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Green apatite crystal

Apatite group; likely fluorapatite, Ca₅(PO₄)₃F

Possible magnetite fragment

Magnetite (Fe₃O₄), tentative identification

Small polished gemstone chips, likely mixed quartz varieties

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Polished gray-green stone, possibly labradorite

Labradorite, a plagioclase feldspar: (Ca,Na)(Al,Si)₄O₈

Quartz-rich pebble (likely milky quartz)

Quartz, SiO₂

Yellow Aventurine

Quartz (SiO2) with inclusions

Quartz pebble

Silicon dioxide (SiO2)

Quartz pebble with iron staining

SiO2

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

K-Feldspar (Potassium Feldspar)

Orthoclase / Microcline (KAlSi3O8)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)