Mineral In A Matrix (Likely Quartz Or Feldspar)

Sandstone Concretion with Fossil Wood

Ferruginous Sandstone Concretion (SiO2 with Fe2O3 cement)

Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidote and Quartz)

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Granite

Granite (Felsic Plutonic Rock)

Fuchsite on Quartzite

Muscovite (Chromium-bearing) K(Al,Cr)2(AlSi3O10)(OH)2

Epidote in Granite Gneiss

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

Quartz (Milky/Gravel variety)

Silicon Dioxide (SiO2)

Pink Granite (with Potassic Feldspar and Quartz)

Felsic Intrusive Igneous Rock (Granite)

Andesite

Andesite (Intermediate Volcanic Rock)

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Sunstone and Green Aventurine

Sunstone: (Ca,Na)[(Al,Si)2Si2O8] (Plagioclase Feldspar Group); Green Aventurine: SiO2 (Quartz)

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Diorite

Intrusive Igneous Rock (Intermediate Composition)

Unakite (or Epidote-rich Granite)

Unakite (composed of Epidote {Ca2(Al, Fe)3(SiO4)3(OH)}, Pink Orthoclase Feldspar {KAlSi3O8}, and Quartz {SiO2})

Graphic Granite (Zebra Rock)

Pegmatitic Granite (composed of Quartz and K-Feldspar)

Quartz

Silicon Dioxide (SiO2)

Granite (with Quartz and Mica)

Phaneritic Felsic Igneous Rock

Granite

Phaneritic Felsic Igneous Rock

Milky Quartz Pebbles

Silicon Dioxide (SiO2)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Scoria with Calcite Infills

Vesicular Basalt with secondary Calcification (CaCO3)

Granite

Phaneritic Felsic Intrusive Rock

Brecciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Limestone (specifically Grainstone or Micrite)

Calcium Carbonate (CaCO3)

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Limestone with Bitumen/Chert

Calcite (CaCO3) containing organic hydrocarbons

Granite

Granite (Phaneritic intrusion / SiO2 + KAlSi3O8 + NaAlSi3O8)

Gneiss

Gneiss (High-grade metamorphic rock)

Granite

Granite (Felsic Plutonic Rock)

Yellow Quartz (Chalcedony or Agate)

Silicon Dioxide (SiO2)

Granite

Plutonic felsic igneous rock

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

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.

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Granite

Granite (a phaneritic intrusive igneous rock)

Orbicular Jasper (Ocean Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Iron-Stained Quartz (Riverside Cobble)

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Massive Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)