Sedimentary (Processed Mineral Product)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Tiger's Eye

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

Black Onyx

Cryptocrystalline Quartz (SiO2)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2 + Manganese/Iron oxides)

Schorl (Black Tourmaline) in Quartz Matrix

Schorl: NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Ruby (Corundum)

Al2O3 (Aluminium oxide with Chromium impurities)

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Tiger's Eye (Golden)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Limonite

Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)

African Turquoise (Jasper)

Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)

Rough Citrine Quartz

Citrine (Silicon Dioxide, SiO2 with iron impurities)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Diamond (Green tinted)

Carbon (C) with trace impurities or lattice defects

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Mica Schist

Mica Schist (contains Muscovite/Biotite, Quartz)

Granite featuring Quartz Vein

Granite with hydrothermal silica (SiO2) intrusion

Sandstone Pebble

Arenite (Sandstone)

Sandstone

Arenite (SiO2 primarily)

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Puddingstone (Jasper Conglomerate)

Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Milky Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of Crocidolite (Asbestos) replaced by Quartz

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Apatite

Fluorapatite (Ca5(PO4)3F)

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

Acicular Azurite (indicated by deep blue, fibrous/fuzzy appearance)

Azurite (Copper Carbonate Hydroxide) - Cu3(CO3)2(OH)2

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye