Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Category
Mineral Side Rock
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Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
igneous
Granitic Pegmatite
Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)
igneous
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Hematite Concretion
Iron oxide (Fe2O3) in concretionary form
sedimentary
Quartzite with inclusions
Metamorphic Quartzite (SiO2 with accessory minerals)
metamorphic
Geode (Chert/Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
sedimentary
Picture Jasper
Silicon dioxide (SiO2)
sedimentary
Serpentinite (often containing Jadeite/Nephrite)
Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4
metamorphic
Banded Agate (specifically Lake Superior Agate)
Silicon dioxide (SiO2) - Cryptocrystalline Chalcedony
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Schist
Schist (various mineral compositions)
Metamorphic
Gneiss
Gneiss
metamorphic
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
metamorphic
Amethyst (Chevron Amethyst)
Amethystine Quartz (SiO2)
mineral
Conglomerate (River Rock Aggregate)
Conglomerate (Lithic-clast conglomerate)
sedimentary
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)
sedimentary
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Breccia Pebble
Sedimentary Breccia
sedimentary
Indigo Gabbro
Gabbro (MaFIC intrusive rock)
igneous
Gneiss
Gneiss
metamorphic
Dalmation Stone (Dalmation Jasper)
Peralkaline Rock with Feldspar and Arfvedsonite
igneous
Sandstone Concretion
Septarian Concretion (Nodule)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt with Olivine Phenocrysts
Porphyritic Basalt (containing Mg2SiO4 - Fe2SiO4)
igneous
Granite Gneiss
Felsic Gneiss
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Granite
Felsic Plutonic Rock
igneous
Basalt
Basalt
igneous