Dolerite (Diabase)

Dolerite / Diabase

igneous

Basalt

Extrusive mafic igneous rock

igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

mineral

Sodalite Syenite

Sodalite-bearing Syenite (Na8(Al6Si6O24)Cl2)

igneous

Moonstone with Black Tourmaline

Orthoclase (KAlSi3O8) with Schorl inclusions

mineral

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

metamorphic

Chert (Iron-stained)

Chert (Cryptocrystalline Silica, SiO2)

sedimentary

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

metamorphic

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

mineral

Basalt (Lava Rock) and Dyed Glass/Quartz

Scoria (Vesicular Basalt)

igneous

Blue Kyanite

Kyanite (Al2SiO5)

mineral

Quartzite pebble

Quartzite (SiO2 dominated)

metamorphic

Amethyst (Variety of Quartz)

Silicon Dioxide (SiO2) with iron impurities

mineral

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Feldsphathic Igneous Rock

igneous

Quartzite (River Stone)

Quartzite (SiO2)

metamorphic

Quartzite (Milky)

Metamorphic rock predominantly composed of Quartz (SiO2)

metamorphic

Sandstone (Quartz-rich)

Arenite (SiO2 based)

sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

sedimentary

Coquina

Bioclastic Limestone

sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

sedimentary

Garnet Schist

Almandine-Mica Schist

metamorphic

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Chert (containing Iron Oxide spots)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (with Limonite staining)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Quartz Variety)

Chert (SiO2)

sedimentary

Siltstone

Siltstone (primarily composed of SiO2)

sedimentary

Mica Schist

Mica Schist (primarily Muscovite and Biotite composition)

metamorphic

Sandstone

Arenite (SiO2 based)

sedimentary

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

sedimentary

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (Lithic Wacke)

sedimentary

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

igneous

Red Jasper

Jasper (Silicon Dioxide with Iron inclusions - SiO2)

Sedimentary/Metamorphic

Chert (variously identified as Flint)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

sedimentary

Ferruginous Sandstone (Red Sandstone)

Arenite with Hematite/Limonite cement

sedimentary

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt or Porphyritic Andesite

igneous

Garnet Schist

Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)

metamorphic

Mica Schist

Schist (Biotite/Muscovite rich)

metamorphic

Red Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral