Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Granite

Granite (a plutonic rock)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Chert (specifically Pink/Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Moonstone (specifically Cat's Eye or Gray Moonstone)

Orthoclase (Potassium Aluminum Silicate) with the formula (K,Na)AlSi3O8

Orange Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Caliche (also known as hardpan, calcrete, kankar)

Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.

Granite

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

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite (Water-worn Cobble)

Quartzite (Composition: 90%+ SiO2)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Quartz (Milky/Yellowish variety)

Silicon Dioxide (SiO2)

Druzy Agate (specifically Black Druzy Agate)

Silicon Dioxide (SiO2)

Ruby in Zoisite

Anyolite (combination of Ca2Al3(SiO4)3(OH) and Al2O3:Cr)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Red Sandstone

Arenite

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Diorite

Diorite (plutonic igneous rock)

Clear Quartz

Silicon Dioxide (SiO2)

Unakite

Epidotized Granite

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Fuchsite (Green Muscovite)

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

Mica Schist

Mica Schist (primarily Muscovite and Biotite composition)

Unakite

Unakite (Epidotized Granite)

Chert (specifically Jasper/Flint)

Microcrystalline Quartz (SiO2)

Shale

Lutaceous Sedimentary Rock

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Jasper and Yellow Chert (Tumbled)

Microcrystalline Quartz (SiO2)

Copper Ore (with Malachite and Azurite)

Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)

Citrine Quartz (likely heat-treated)

Silicon Dioxide (SiO2)

Tiger's Eye (Inlaid in a band)

SiO2 (Silicon Dioxide with Crocidolite inclusions)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Cockle Shell (Fossil or Recent)

Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Granite

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate (specifically Sardonyx)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Basalt with Iron Oxidation

Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)