Sedimentary Or Metamorphic (Low Grade)

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)

Ferruginous Sandstone

Ferruginous Sandstone (Quartz Arenite with Iron Oxide cement)

Burmese Jadeite

Jadeite (NaAlSi2O6)

Jade (Jadeite or Nephrite)

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

Epidotite (Unakite-related)

Epidote-rich rock

Red Jasper with Quartz Veining

Microcrystalline Quartz (SiO2)

Weathered iron-rich sandstone or lateritic rock

Ferruginous sandstone/laterite; chiefly quartz (SiO₂) with iron oxides such as hematite and goethite

Serpentinite

Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4

Greenstone

Metamorphic mafic rock (greenschist facies)

Coal (Bituminous / Anthracite)

Organic Sedimentary Rock (Carbonaceous Rock)

Blue-gray metamorphic rock, likely slate or schist

Foliated phyllite–schist; chiefly quartz, mica, and chlorite (exact identification requires testing)

Phyllite (possibly low-grade greenish slate)

Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Ironstone Concretion (Nutstone)

Ironstone (with High Limonite/Hematite Content)

Marble

Metamorphosed Limestone (main mineral: Calcite, CaCO3)

Blue-gray foliated metamorphic rock, likely slate or phyllite

Slate (fine-grained metamorphosed shale), possibly phyllite; mineral proportions cannot be confirmed from the image

Quartz on Greenstone

Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit

Tumbled quartz pebble

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

Graphite-rich schist (likely graphite ore)

Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar

Slate / Greenschist

Foliated Metamorphic Rock (Greenschist/Slate)

Greenstone (likely altered basalt or greenschist)

Greenschist-facies mafic rock; commonly chlorite–actinolite–albite ± epidote, or chlorite-altered basalt

Likely slate or fine-grained metamorphic rock

Slate; predominantly microscopic mica, quartz, and clay-derived minerals

Fine-grained dark metamorphic rock, likely slate or phyllite

Slate/phyllite; chiefly quartz, mica, and chlorite

Greenstone / River Jadeite pebble

Metavolcanic rock / Chlorite or Actinolite-rich schist

Serpentinite (often called Jade or Nephrite substitute)

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Slate

Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)

Greenstone

Metabasalt / Greenschist facies rock

Greenstone Pebble

Metabasalt (often containing chlorite, actinolite, or epidote)

Greenstone / Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Bloodstone (Heliotrope)

SiO2 (Cryptocrystalline Quartz / Chalcedony)

Jadeite Jade

Jadeite (NaAlSi2O6)

Schist (Greenschist / Mica Schist)

Schist (variable mineral composition, commonly containing quartz, feldspar, mica, chlorite)

Emerald in Matrix (Quartz/Calcite)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Dark gray metamorphic rock, likely slate or phyllite

Slate/phyllite; chiefly fine-grained mica, chlorite, quartz, and clay-derived minerals

Jasper

Silicon dioxide (SiO2) with impurities

Small polished green stone, possibly serpentine or greenstone

Likely serpentine-rich rock; exact identification is limited by the blurred image

Schist

Mica Schist

Siltstone

Siltstone (primarily SiO2 with Fe2O3)

sedimentary (if chert) / metamorphic (if quartzite)

Chert (or potentially massive Quartz/Quartzite)

SiO2 (Silicon Dioxide)

Greenstone / altered basalt (probable)

Chlorite–epidote–actinolite-rich metabasalt; exact identification requires testing

Calcite-rich limestone (likely crystalline limestone/marble)

Calcite, CaCO₃; likely recrystallized carbonate rock