Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Category
Non Geological
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Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Vesicular Basalt
Basalt with vesicular texture
igneous
Glacial Erratic (Sandstone/Quartzite)
Glacial Erratic specimen (likely Orthoquartzite or Feldspathic Sandstone)
sedimentary or metamorphic
Concretion
Septarian Concretion
sedimentary
Glacial Granite with Epidote
Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
igneous
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Basalt Column Section
Columnar Basalt (Mafic Extrusive Igneous Rock)
igneous
Puddingstone (specifically Gowganda Tillite or Jasper Conglomerate)
Jasper Conglomerate
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Fossilized Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Ammonite Fossil (Polished Half / Cleoniceras)
Ammonoidea (Subclass), often Cleoniceras genus; fossilized with Calcite (CaCO3) and Aragonite
Sedimentary
Fossilized Coral (Petrified Coral)
Anthozoa (Scleractinia)
sedimentary
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Veined Sandstone with Calcite Veins
Sedimentary sandstone with hydrothermal/mineral veins
sedimentary
Fossilized Coral
Rugosa / Scleractinia (Agatized or Calcitized Coral)
fossil
Fossiliferous Rock (Invertebrate Fossil in Matrix)
Fossiliferous limestone or shaly matrix containing skeletal fossil remains
fossil
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Chalcedony (Agate / Quartz Nodule)
Silicon Dioxide (SiO2)
mineral
Quartz Matrix with Iron Staining / Mica Schist
Silicon Dioxide (SiO2) with Iron Oxide staining
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet.
fossil
Fossil Coral (Rugose Coral / Horn Coral Cross-Section)
Rugosa (Order) / Calcite (CaCO3)
fossil
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Feldspar and Matrix
Silicon Dioxide (SiO2) with Potassium/Plagioclase Feldspar
mineral
Jasper in Quartz / Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Agate Geode
Silicon Dioxide (Chalcedony / Quartz), SiO2
sedimentary
Amygdaloidal Basalt
Extrusive Igneous Rock with Amygdules
igneous
Pyrite Schist
Metamorphic rock containing FeS2 (Pyrite) with mica and quartz
metamorphic
Jasper
Silicon Dioxide (Microcrystalline Quartz / Chalcedony)
sedimentary
Quartz Geode
Crystalline Quartz (SiO2) within a sedimentary/igneous host
mineral
Moqui Marble (Shaman Stone)
Ironstone Concretion (Goethite/Hematite Shell)
sedimentary
Quartz Geode
Macrocrystalline Quartz (SiO2) within a geode structure
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Siltstone Concretion
Carbonate-cemented Siltstone Concretion
sedimentary
Crinoid Stem Fossil in Matrix
Phylum Echinodermata, Class Crinoidea
fossil
Belemite Rostrum
Belemnoidea (Order)
fossil
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone (Crinoid stem fragments)
Bioclast-bearing Carbonate Rock (Caco3)
fossil
Fossilized Crinoid Stem in Limestone
Crinoidea (Class) in Calcium Carbonate (CaCO3) matrix
fossil
Fossil Coral
Cnidaria fossil (often Calcium Carbonate / CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary