Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
igneous
Category
Mineral, Specifically A Detrital Grain
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Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)
Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates
igneous, sedimentary, and metamorphic
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Feldspar (Potassium Feldspar / Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Gravel
Unconsolidated rock fragments / detrital sediment
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Siltstone
Siltstone (Detrital Clastic Sedimentary Rock)
sedimentary
Chert (specifically Tan Chert)
Chert (SiO2)
sedimentary
Unidentifiable Rock Fragment
Uncertain
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)
Mineral
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
River Gravel
Polymictic Gravel / Detrital Rock Aggregate
sedimentary
Moqui Marble (Shaman Stone)
Ironstone Concretion (Iron oxide Fe2O3 and FeO(OH))
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments / detrital sediment
sedimentary
Gravel and River Pebbles
Unconsolidated rock fragments / Detrital sediment
sedimentary
Gravel and Pavement Aggregates
Unconsolidated rock fragments / detrital sediments
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz / Chalcedony Pebble
Silicon Dioxide (SiO2)
sedimentary
Glauconitic Sandstone (Greensand)
Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Mixed small pebbles and mineral grains
Unidentified detrital sediment; likely quartz-, feldspar-, and lithic fragments
sedimentary
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Agate (specifically Carnelian or Honey Agate)
Silicon Dioxide (SiO2)
Mineral
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Ironstone Concretion (Moqui Marble)
Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)
sedimentary
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Yellow Jasper / Chert
Silicon Dioxide (SiO2) with Goethite or Limonite inclusions
sedimentary
Pebble
Lithic fragment / Water-worn rock
sedimentary
River Pebbles (Quartzite / Granite Pebbles)
SiO2 (Quartz-rich detrital gravel)
sedimentary
Granitic Pegmatite
Granite Pegmatite (coarse-grained intrusive igneous rock)
igneous
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
K2 Jasper (K2 Stone)
Azurite in Granite / Quartzite
metamorphic
Porphyry (specifically Porphyritic Rhyolite or Andesite)
Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)
igneous
Brown Antique Granite
Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)
igneous
Diabase
Diabase (also known as Dolerite)
igneous