Metamorphic

River Rock (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneiss)

Garnet Schist

Almandine-bearing Mica Schist

Yellow Quartzite (River Pebble)

Crystalline Quartz (SiO2)

Quartzite (Engineered Stone)

Silicon Dioxide (SiO2) based synthetic composite

Blue Quartzite (Blue Aventurine / Dumortierite Quartz)

Quartzite with inclusions (SiO2 with AlAl4BSi3O18)

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Quartzite River Pebble

Quartzite (primarily Silicon Dioxide, SiO2)

Schist

Mica Schist (contains muscovite/biotite and quartz)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Milky Quartz with Chlorite/Epidote

Silicon Dioxide (SiO2) with phyllosilicate or sorosilicate inclusions

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Rhodonite

Rhodonite (MnSiO3)

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (High-Grade Metamorphic Rock)

Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)

Prase or Green Quartz

Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)

Charnockite

Orthopyroxene-bearing granite (Charnockite)

Quartzite River Rock

Quartzite (primarily SiO2)

Schist

Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)

Garnet in Quartz Matrix

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Biotite Mica in Host Rock

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

Schist (Kyanite Schist)

Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)

Greenshist / Chlorite Schist

Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Slate

Foliated metamorphic rock (Slate)

Yellow Quartzite

Metamorphic Rock (Mainly SiO2)

Lapis Lazuli

Lazurite-rich metamorphic rock

Glaucophane Schist (Blueschist)

Blueschist facies metamorphic rock

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Gneiss

High-grade Metamorphic Gneiss

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Mica Schist

Foliated Metamorphic Rock (Schist)

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Slate

Slate (Foliated Metamorphic Rock)

Lapis Lazuli

Lazurite-rich metamorphic rock

Slate

Slate (foliated metamorphic rock)

Quartzite

Metamorphic Quartzite (primarily SiO2)

Gneiss

High-grade Metamorphic Gneiss

Diorite (Gneissic)

Diorite with possible metamorphic foliation