Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Category
Organic (Biological Organism)
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Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary
Limestone Cobble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Amber (specifically Red or Cherry Amber)
Succinite (Resinite); Chemical formula: C10H16O
Mineraloid
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
sedimentary
Zebra Marble
Metamorphosed Limestone (Recrystallized Calcite)
metamorphic
Rounded brown sandstone or weathered river cobble
Likely quartz-rich sandstone; exact identification requires a fresh surface and tests
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Amber (Copal)
Succiniferous Resin
mineraloid
Petoskey Stone
Hexagonaria percarinata (Silicified/Calcitic)
fossil
Chert (Flint Nodular)
Silicon Dioxide (SiO2)
sedimentary
Coral Fossil
Anthozoa (order Scleractinia)
fossil
Sandstone with Iron Oxide Concretion
Arenite with Hematite/Goethite Concretion
sedimentary
Banded Iron Formation (BIF) with potential Stromatolite/Biogenic Trace
Ferruginous Chert / Banded Iron Formation (BIF)
sedimentary
Amber
Fossilized Tree Resin
gemstone
Amber
Succinite (Fossilized Tree Resin, C10H16O)
mineral
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2)
mineral
Amber
Succinite (C10H16O)
mineral
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Green Moss Agate / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions
sedimentary
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Amber / Copal
Succinite (fossilized tree resin)
mineraloid
Shale
Shale (comprised mostly of clay minerals and quartz)
sedimentary
Coprolite
Coprolite
sedimentary
Chert (Arrowhead Preform)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amber
Succinite (C10H16O)
mineral
Shale
Fissile Mudstone (Shale)
sedimentary
Gastropod Fossil (Snail Steinkern)
Class Gastropoda (internal mold)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Fossilized Coral (Petoskey Stone / Favosites)
Favosites (extinct genus of tabulate coral)
sedimentary
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Pearl (likely Freshwater or Akoya Cultured)
Aragonite / Conchiolin composite (CaCO3)
Mineralloid (Organic gemstone)
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone