Sedimentary And Igneous

Dalmation Stone

Peralkaline rhyolite (SiO2 with Arfvedsonite/Riebeckite)

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Blue Calcite

Calcium Carbonate (CaCO3)

Sandstone or Mudstone with Iron Staining

Ferruginous Sandstone/Mudstone

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

River Stone (Basalt or Siltstone with banding)

Polished Basaltic or Siliciclastic River Cobble

Dalmatian Jasper (Dyed Blue)

Peralkaline Rock with Arfvedsonite and Blue Dye

Dalmatian Stone

Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Magnetite

Magnetite (Fe3O4)

Dalmatian Stone

Dalmatian Stone (formerly called Dalmatian Jasper)

Raw Calcite

Calcium Carbonate (CaCO3)

Pyrite-bearing Rock

Iron Sulfide (FeS2) associated with host rock

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

White Quartz

Silicon Dioxide (SiO2)

Agate

Chalcedony (SiO2)

Fuchsite (Green Muscovite / Mica Schist)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Orange Quartz / Peach Aventurine

Silicon Dioxide (SiO2)

Magnetite / Lodestone

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Rough Quartz (Milky / Clear Quartz)

Silicon Dioxide (SiO2)

Magnetite / Hematite mix

Magnetite (Fe3O4) and Hematite (Fe2O3)

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Magnetite or Hematite Nodule

Iron Oxide (Fe3O4 or Fe2O3)

Grey Banded Agate

Silicon Dioxide (SiO2)

Pebble Gravel Mix (Quartzite, Basalt, Chert)

Alluvial River Gravel / Aggregate Clasts

Milky Quartz

Silicon Dioxide (SiO2)

Massive White Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Quartz (Milky or Yellow variety)

Silicon Dioxide (SiO2)

Greenish Metamorphic Rock (likely containing epidote or chlorite)

Metamorphic rock, possibly epidosite or greenstone

Agate

Banded Chalcedony (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Hematite

Hematite, Iron(III) oxide (Fe2O3)