Metamorphic Or Sedimentary (With Staining)

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)

Orbicular Quartz Diorite / Tonalite

Tiger's Eye (Multicolor/Variegated)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Chrysocolla in Matrix

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz with Iron Staining

Silicon Dioxide (SiO2) with iron oxide impurities

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Quartz with Hematite Staining

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)

Granitic Quartz (with Feldspar inclusions)

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Blue Kyanite

Kyanite (Al2SiO5)

Milky Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Basalt Pebble

Aphanitic mafic volcanic rock

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeO(OH)) inclusions

Basalt (with possible iron oxide staining)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Bull Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz (Milky/Granular)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Milky Quartz (Water-Worn Pebble)

Quartz (Silicon Dioxide, SiO2)

Golden Healer Quartz

Silicon Dioxide (SiO2) with Ferruginous (Iron Oxide) inclusions

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Basalt with Iron Oxidation

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Druzy Quartz on Chert/Chalcedony

Silicon Dioxide (SiO2)

Ferruginous Quartz (Stained Quartz)

Silicon Dioxide (SiO2) with secondary Iron Oxide inclusions (Limonite/Hematite)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferruginous Oxides

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions