Metamorphic Or Sedimentary Depending On Local Grade

Schist with Quartz Veins

Schist with Quartz (SiO2)

Quartzite (Iron-stained)

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Quartz Pebble

Silicon Dioxide (SiO2)

Sunstone with Black Tourmaline (Arfvedsonite)

Feldspar (Na,Ca)(Al,Si)4O8 with Schorl Na(Fe3+)3Al6(Si6O18)(BO3)3(OH)3(OH)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Epidote

Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Greenschist

Greenschist (Chlorite-Albite-Epidote Schist)

Schist

Mica Schist (Medium-grade metamorphic rock)

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Nuummite

Orthorhombic amphibole (Gedrite and Anthophyllite mixture) - (Mg,Fe)7Si8O22(OH)2

Greenstone

Metabasalt

Greenstone

Greenschist / Meta-basalt

Schist

Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)

Greenstone

Greenschist (composed of actinolite, chlorite, and epidote)

Quartzite

Quartzite (Silicon Dioxide: SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Labradorite

(Ca,Na)(Al,Si)4O8

Schorl (Black Tourmaline)

Sodium Iron Aluminum Borosilicate Hydroxide - NaFe2+3Al6Si6O18(BO3)3(OH)3OH

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Anthracite Coal

Low-grade metamorphic carbonaceous rock

Slate with Iron Staining

Low-grade Metamorphic Mudstone (Slate)

Rough Diamond

Native Carbon (C)

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Diamond

Carbon (C)

Gold and Silver (Metal Components of an Antique Pocket Watch)

Native Gold (Au) and Native Silver (Ag)

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

Greenstone (Greenschist)

Greenschist facies rock (containing chlorite, epidote, actinolite)