Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Category
Anthropogenic Sedimentary Style Organic Solid
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Mookaite Jasper
Siliceous (chert) sedimentary rock, a form of Jasper
Sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron and manganese inclusions
sedimentary
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Hand-Drawn Gengar Pokémon Card Artist Item
Lignocellulosic Fiber (Cellulose, C6H10O5) with wax-based pigment (crayon/colored pencil)
Organic (Paper and Cellulose)
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
sedimentary
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
mineral
River Pebble
Quartzite / Weathered Sedimentary Rock
sedimentary
Amethyst Geode
Amethyst (Silicon Dioxide, SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Quartz Geode (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Black Onyx
Cryptocrystalline Quartz (SiO2 with organic/iron impurities)
mineral
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
mineral
Agate (Puddingstone style)
Silicon Dioxide (SiO2) with impurities
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Grey Agate Geode
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Map Jasper (Grey Picasso Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Pyrite with Limonite/Goethite Alteration (Pseudomorph)
Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary
Weathered geode or vug-bearing rock
Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image
mineral
Amber
Succinite (Approximate formula: C10H16O)
Mineraloid
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony
gemstone
Quartzite Pebble
Quartzite
metamorphic
Geode (Unopened)
Silica-rich Concretion (SiO2)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Tumbled Agate
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Red Jasper
SiO2
mineral
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Red Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chalcedony (Yellow Jasper or Agate)
Microcrystalline Quartz (SiO2)
mineral
Orange Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Hand-Drawn Trading Card (Amateur Artwork)
Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)
Organic/Synthetic Composite (Paper and Pigment)
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary