Non Geological

Browse non geological specimens identified by the Rock Identifier community.

Zebra Jasper

Tetragonal Silicon Dioxide (Quartz) with impurities

sedimentary

Banded Onyx (Calcite Marble)

Calcite (CaCO3) - Trap-rock or Cave Onyx

sedimentary

Chert / River Jasper

Microcrystalline Quartz (SiO2)

sedimentary

Limestone (Weathered)

Calcium Carbonate (CaCO3)

sedimentary

Sandstone with Liesegang Rings

Arenite with secondary Iron oxide (Limonite/Goethite) precipitation

sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

sedimentary

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

sedimentary

Pumice (Volcanic Rock)

Vesicular volcanic rock (composed largely of amorphous volcanic glass)

igneous

Quartzite (Lithic Artifact)

Quartzite (SiO2)

metamorphic

Crushed Stone / Greywacke

Greywacke (Indurated Sandstone)

sedimentary

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

man-made/construction material

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)

sedimentary

Basalt (Greenstone)

Amygdaloidal Basalt / Chloritized Basalt

Igneous

Quartzite (Quartz-rich Cobble)

Quartzite (SiO2)

metamorphic

Sandstone (Weathered)

Arenite (primarily SiO2)

sedimentary

Coquina

Biogenic Limestone

sedimentary

Quartzite

Quartzite (primarily SiO2)

metamorphic

Apache Tear

Obsidian (Volcanic Glass), formula: 70–75% SiO2 plus MgO, Fe3O4

igneous

Popcorn

Zea mays everta (P. Wilson) (Botanical name for the corn variety)

Organic/Biogenic

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Yellow Quartz (Rough)

Silicon Dioxide (SiO2)

mineral

Druzy Quartz

Silicon Dioxide (SiO2)

mineral

Silver (S925)

Native Silver (Ag)

mineral

Rose Quartz

Quartz (SiO2) with trace amounts of Titanium, Iron, or Manganese

mineral

Unakite

Epidotized Granite

metamorphic

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Rose Quartz

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

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Gold Nugget

Native Gold (Au)

mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

mineral

Optical Calcite (Iceland Spar)

Calcium Carbonate (CaCO3)

mineral

Unakite

Epidotized Granite

metamorphic

Gold Nugget

Native Gold (Au)

mineral

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

sedimentary

Clear Quartz Crystal

Silicon Dioxide (SiO2)

mineral

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Mineral

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Mineral