Igneous, Sedimentary, And Metamorphic Mix

K2 Jasper (K2 Granite)

Azurite in Granite (Biotite Granite containing Azurite)

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Pyrite

Iron Sulfide (FeS2)

Garnet

Garnet group [X3Y2(SiO4)3]

Zebra Rock / Zebra Marble

Banded Limestone-Marble Transition

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Mica Schist

Muscovite Schist (KAl2(AlSi3O10)(OH)2)

Schist

Mica Schist (Metamorphic Rock)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Sandstone or Mudstone with Iron Staining

Ferruginous Sandstone/Mudstone

River Stone (Basalt or Siltstone with banding)

Polished Basaltic or Siliciclastic River Cobble

Granitic Pegmatite

Granitic Pegmatite with Quartz and Feldspar

Blue Kyanite

Kyanite (Al2SiO5)

Epidote in Granite Gneiss

Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))

Quartz

Quartz (SiO₂)

Greenstone with Quartz Veining

Epidiorite or Metabasalt with SiO2 (Quartz) veins

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Marble (polished)

Recrystallized Calcite (CaCO3)

Biotite Schist

Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]

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.

Greywacke (Briarcliff Schist/Gneiss)

Manhattan Schist / Fordham Gneiss complex

Lapis Lazuli (Lazurite crystals on Marble)

Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]

Pyrite

Iron Disulfide (FeS2)

Yellow Quartz (Citrine/Yellow Chalcedony)

Silicon Dioxide (SiO2)

White Marble

Recrystallized Calcite (CaCO3)

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Gneiss

Gneiss

Blue Calcite

Calcium Carbonate (CaCO3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

White Agate (resembling Bone Chalcedony)

Cryptocrystalline Quartz (SiO2)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold) in Matrix

Iron Sulfide (FeS2)

Green Calcite

Calcium Carbonate (CaCO3)

Marble

Recrystallized Calcite (CaCO3) Rock

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Banded Slate (Sedimentary Pebble)

Slate (Metamorphosed Shale or Mudstone)