Limestone

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Painted Garden Rock (likely Granite or Limestone base)

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)

Amphibolite

Amphibolite

Marble

Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)

Granite

Granite (a common rock type, not a single mineral species)

Banded Chert or Chert with Quartz Veins

Chert (SiO2)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Chalcedony Geode

Chalcedony (SiO2) within a geode structure

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Quartzite

Quartzite

Quartz

Quartz (SiO2 - Silicon Dioxide)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony