Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
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Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Dalmatian jasper (often sold as Dalmatian stone)
Porphyritic alkali feldspar–quartz syenite, commonly with black arfvedsonite/aegirine-group amphibole inclusions
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Laterite (Iron-rich bauxite or Gossan)
Ferricrete (Fe2O3·nH2O)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Silicified oyster fossil
Fossil oyster shell, commonly Ostrea or Crassostrea, replaced or encrusted by chalcedony/quartz
fossil
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Granitoid (Granitic Rock)
Granitoid (Quartzo-feldspathic plutonic rock)
igneous
Mudstone
Lutylite (group of fine-grained sedimentary rocks)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sulfur
Native Sulfur (S)
mineral
Sulfur (with Matrix)
Native Sulfur (S8)
mineral
Possible basalt or iron-rich slag
Basalt (tentative; identification uncertain from image)
igneous
Sandstone (with Iron Staining)
Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)
sedimentary
Anthracite Coal with Sulfur staining
Anthracite (Carbon C with impurities)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)
Likely polished bronzite or serpentine-rich rock
Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing
mineral
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Granodiorite
Granodiorite
igneous
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Granite Pegmatite with Muscovite Mica
Granite Pegmatite (Silicon Dioxide and complex silicates)
igneous
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Asphalt Concrete
Bituminous conglomerate
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Granite-like pegmatitic rock
Coarse-grained granitoid, likely quartz–feldspar–mica aggregate
igneous
Small dark mineral/rock fragment
Indeterminate; possibly magnetite-bearing basalt or iron-rich slag
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Schist
Schist (Crystalline metamorphic rock)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Technogenic / Anthropogenic Pavement Material
Silver (Native Element)
Ag (Argentum)
mineral
Greenstone Celt (Polished Stone Axe)
Metamorphosed mafic rock (often Basalt or Diabase)
metamorphic