Metamorphic Rock (Composed Of Multiple Minerals)

Rhodonite (in matrix)

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Quartz Vein in Host Rock

Quartz (SiO2) in Mafic or Sedimentary Matrix

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gossan (with secondary copper minerals)

Iron-rich oxidized rock cap (Limonite/Goethite with Malachite/Chrysocolla inclusions)

Granite Pebble

Granite (Felsic intrusive igneous rock)

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Greenschist

Greenschist (Chlorite Schist)

Schist

Mica Schist

Mica Schist with Quartz

Mica-Quartz Schist (Muscovite subclass)

Biotite Schist

Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)

Shiva Lingam

Cryptocrystalline Quartz (Jasperiod Siltstone)

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Quartz Vein in Schist

Quartz (SiO2) in Pelitic Schist

Greenstone

Greenschist (containing chlorite, epidote, and actinolite)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss

Basalt

Extrusive Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Quartz with Schist Matrix

Crystalline Silicon Dioxide (SiO2) in micaceous schist

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

Quartz

Silicon Dioxide (SiO2)

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Pink Granite

Phaneritic intrusive felsic igneous rock

Gneiss

Gneiss (High-grade metamorphic rock)

Epidote

Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))

Granite

Granite

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix

Greenstone

Metabasalt / Greenstone

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

Greenschist

Greenschist (Actinolite-Chlorite Schist)

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Epidote in Quartz

Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)

Slickenside

Tectonic Fault Scarp Surface

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss (Metamorphic Cobble)

Gneiss

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) with host rock (often Schist or Basalt)

Yellow Quartz

Silicon Dioxide (SiO2)

Epidote in Matrix (likely Amphibolite or Gneiss)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix