Igneous Or Metamorphic

Quartzite

Quartzite (primarily SiO2)

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Fuchsite on Quartz

Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

Unakite

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

André Landed Here Rock (Glacial Erratic)

Granodiorite / Diorite (compositional estimate)

White Marble (Tumbled)

Recrystallized Calcite (CaCO3)

Blue Quartzite (Aventurine)

Quartzite (primarily SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Granite

Granite

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Green Aventurine

Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Schist

Mica Schist

Ruby in Zoisite (Anyolite)

Anyolite (Combination of Corundum and Zoisite)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite with inclusions

Quartzite (primarily SiO2)

Red Quartzite

Quartzite (SiO2 with iron oxide impurities)

Quartzite

Quartzite (Primary mineral: SiO2)

Quartzite

Quartzite (SiO2)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Schist (Garnet-Mica Schist)

Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Schist (Biotite Schist)

Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Quartzite

Quartzite (primarily SiO2)

Unakite (Tumbled)

Unakite (altered granite)

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Basalt with Quartz Veins

Amygdaloidal Basalt (matrix) with Crystalline SiO2 (veins)

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Yellow Quartzite Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Marble

Recrystallized Carbonate Rock (CaCO3)

Marble (Fire and Ice or Pink Veined)

Metamorphosed Limestone (principally CaCO3)

Green Quartzite (or Aventurine)

SiO2 (Silicon Dioxide) primarily, with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Slate

Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)