Man Made Rock (Sedimentary Analogue)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper

Tumbled gray chalcedony (likely agate or quartzite)

Microcrystalline quartz, SiO₂ (chalcedony)

Tektite

Natural impact glass

Chert (Chert / Flint Variety)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Granite

Granite (Silicic Intrusive Igneous Rock)

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Yooperlite (Syenite clast containing fluorescent Sodalite)

Sodalite-bearing Syenite

Quartzite pebble

Quartzite (SiO2)

Grey Granite

Phaneritic Felsic Intrusive Igneous Rock

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Lapis Lazuli

Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Blue Chalcedony

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Diorite

Diorite (Plagioclase feldspar and amphibole/biotite)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Concrete aggregate surface

Human-made cementitious composite; primarily calcium-silicate-hydrate cement with mixed silicate aggregate

Chert or Jasper

Microcrystalline Quartz (SiO2)

Chert (likely jasper/chalcedony-rich chert)

Microcrystalline quartz, SiO₂

Coquina

Bioclastic Limestone

Chert (often called Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (specifically Gray/Blue-Gray Chert)

Chert (SiO2)

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Diorite

Diorite (Intermediate intrusive igneous rock)

Asphalt

Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)

Chalcedony (Common Opal or Agate variant)

Silicon dioxide (SiO2) with trace hydration

Small metallic-gold mineral fragment, possibly pyrite

Pyrite (FeS₂), if confirmed

Marble

Recrystallized Calcite (CaCO3)

Tumbled cream-colored pebble

Likely quartz-rich sandstone or limestone; exact identification requires testing

Basalt

Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)

Granite

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Chert (Siltstone / Flint)

SiO2 (Cryptocrystalline Quartz)

Jasper

Silicon dioxide (SiO2) with impurities

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)