Rounded sedimentary pebble, likely mudstone or shale
Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides
sedimentary
Category
Sedimentary (Imitation)
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Common Pebble / Sedimentary Rock Fragment
Lithified clastic sediment
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Red Sandstone
Sandstone (principally Quartz, SiO2, with Iron Oxide hematite cement)
sedimentary
Sandstone
Sandstone (SiO2 predominant)
sedimentary
Fossiliferous Limestone
Bioclastic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone with Brachiopods
Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)
sedimentary
Quartz Vein in Basalt or Sedimentary Host Rock
Silica-veined lithic fragment (SiO2 in host matrix)
sedimentary
Vein-filled Sedimentary Rock
Silicified sedimentary rock with quartz/calcite vein
sedimentary
Quartz-veined Sedimentary Rock
Sedimentary rock with hydrothermal quartz veins
sedimentary
Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Smooth gray river pebble
Likely fine-grained sandstone or siltstone; exact identification requires a fresh surface and tests
sedimentary
Honey calcite (orange calcite)
Calcite, calcium carbonate (CaCO₃)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
mineral
Red Jasper
Red Jasper (SiO2)
sedimentary
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Puddingstone (Gowganda Tillite/Lorrain Quartzite)
Jasper Conglomerate
sedimentary
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Sandstone and River Pebbles
Sedimentary Rock (Sandstone / Quartzite / Chert)
sedimentary
Limestone (or Sandstone)
Calcium Carbonate (CaCO3) / Silica (SiO2)
sedimentary
Polished red jasper (likely hematite-bearing jasper)
Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides such as hematite/goethite
mineral
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite Cubes in Matrix
Iron Disulfide (FeS2) in Host Matrix
mineral side rock
Quartz Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Red Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Wishing Stone (Quartz-veined Sedimentary Pebble)
Silicified sedimentary rock with quartz vein (SiO2)
sedimentary
Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone)
Silicified limestone or banded sedimentary rock with mineral veins
sedimentary
Sedimentary Rock with Crafts (Pet Rock)
Sedimentary rock decorated with synthetic materials
sedimentary