Sedimentary Rock (Altered)

Fluorite and Rose Quartz

Fluorite (CaF2), Rose Quartz (SiO2)

Marble

Metamorphosed Limestone/Dolomite

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Sedimentary Rock (Metamorphosed)

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

igneous

Anthracite Coal

Anthracite (a variety of coal, predominantly carbon)

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

igneous, sedimentary, and metamorphic

Quartz

Quartz (SiO2 - Silicon Dioxide)

Granite Gneiss

High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)

Quartz

Quartz (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral with metamorphic or sedimentary host

Chert (or Flint)

SiO2 (predominantly microcrystalline quartz)

Sedimentary

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Quartzite

Quartzite (primarily SiO2)

Metamorphic

Yellow Jasper (within host rock)

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

sedimentary

Pyrite

Pyrite (Iron Disulfide), FeS2

Metamorphic Rock (composed of multiple minerals)

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Metamorphic Rock

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

sedimentary

Ruby in Zoisite

Ruby (α-Al2O3) embedded in Zoisite (Ca2Al3(SiO4)3(OH)) with some Hornblende

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

sedimentary and igneous (mixed)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Carnelian (Chalcedony variety)

SiO2 (Silicon Dioxide)

Mineral/Sedimentary Interface

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Quartz

Silicon dioxide (SiO2)

Man-made Object (Metal/Alloy)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Halite

Halite (NaCl)

Chalcedony (Agate/Jasper mix in host rock)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Sedimentary Rock (technically a microcrystalline quartz mineral aggregate)

Chert / Flint (a variety of Chert)

Chert (SiO2)

River Pebbles (Stream-rounded rocks)

Fluvial Detritus (varied mineralogy)

Mixed (predominantly sedimentary and igneous)

Agate (various color varieties)

SiO₂ (Silicon Dioxide)

Mineral (specifically a variety of Chalcedony, which is a microcrystalline quartz)

Quartz (likely milky/gray variety)

Quartz (SiO₂)

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Halite (Rock Salt)

Halite; NaCl (Sodium Chloride)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

sedimentary (fossilized organic remains)

Brachiopod Fossil (Spiriferid)

Phylum Brachiopoda, Order Spiriferida (CaCO3 - Calcium Carbonate)

Chert (often called Flint or River Rock)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Quartz Geode/Cluster

Quartz (SiO2)