Metamorphic

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite and other associated minerals)

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Corundum; Ca2Al3(SiO4)3(OH) + Al2O3

Riverstone Quartzite / Chalcedony Nugget

Silicon Dioxide (SiO2)

Anthracite Coal

Anthracite

Green Aventurine (Quartz)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Shungite

Non-crystalline carbon (Fullerenes / Carbon-60)

Quartzite Pebble

Quartzite (predominantly Silicon Dioxide - SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Schist (Micaceous)

Mica Schist

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Quartzite with Iron inclusions

Metamorphosed Sandstone (SiO2 with Fe2O3)

Unakite

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Beach Quartzite (Yellow-stained Quartz)

Quartzite (SiO2 with Iron oxide staining)

Unakite (Epidotized Granite)

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Red Quartzite / Ferruginous Quartzite

Quartzite (SiO2 with Iron Oxide impurities)

Pink Quartzite

Quartzite (primarily SiO2)

Quartzite (tumbled or water-worn)

Quartzite (composition: SiO2)

Schist with Quartz/Mica

Mica Schist (primarily Muscovite and Quartz)

Nephrite Jade

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

Greenstone

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

Nephrite Jade

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

Unakite

Epidotized Granite

Quartzite with Quartz Vein

Metamorphosed sandstone (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Tiger's Eye (Unpolished)

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite (with Iron Staining)

Quartzite (predominantly SiO2)

Quartzite (specifically Milky Quartz variety)

Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Nephrite Jade

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

Charoite

Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O

Unakite

Epidotized Granite

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2

Unakite

Unakitized granodiorite / Quartz-Epidote-Feldspar rock