Dalmatian Jasper
Dalmatian Stone (Arfvedsonite/Albite Microquartz)
igneous
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Mineral Based Human Made Alloy
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Epidote (likely Unakite component or Epidosite)
Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Sandstone and River Pebbles
Sedimentary Rock (Sandstone / Quartzite / Chert)
sedimentary
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Schist
Mica Schist
metamorphic
Yellow Ochre
Goethite-rich clay (Hydrated Iron Oxide: FeO(OH)·nH₂O)
mineral
Sandstone
Arenite (mainly SiO2 with varying cements)
sedimentary
Milky Quartz with Talc / Serpentine
Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2
metamorphic
Quartz (Chert/Quartzite)
Silicon Dioxide (SiO2)
mineral
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Magnetite-rich Basalt
Basalt containing Fe3O4
igneous
Gneiss (River Cobble)
Gneiss
metamorphic
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Ironstone / Hematite
Iron(III) oxide (Fe2O3)
mineral
Basalt with Epidote (Porphyritic Basalt)
Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions
igneous
Crushed Granite and Quartz Gravel
Composite Igneous and Silicate Rock Aggregate
igneous
Polished brown jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
gemstone
Banded Chert or Chert with Quartz Veins
Chert (SiO2)
Sedimentary
Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
sedimentary
Schist
Mica Schist
metamorphic
Vesicular basalt (likely weathered lava rock)
Vesicular basalt; primarily plagioclase feldspar, pyroxene, and volcanic glass, with possible iron-oxide alteration
igneous
Mica Schist
Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)
metamorphic
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Kaolinite (China Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Vesicular Basalt with Pyrite
Basalt (MgFe2+)(Si,Al)2O6 containing FeS2 inclusions
igneous
Chert Nodule
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Green Jasper)
Microcrystalline Quartz (SiO2) with iron silicate inclusions
sedimentary
Chert (Chert Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint in dark varieties)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint when in chalk or limestone)
Silicon Dioxide (SiO₂)
sedimentary
Chert (Flint Nodules)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (White Flint)
Silicon Dioxide (SiO2)
sedimentary