Quartz

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Limonite) inclusions

Quartz-bearing pegmatite or feldspar-rich rock

Likely granitic pegmatite composed mainly of quartz (SiO₂) and feldspar, with possible mica or iron-oxide staining

Quartz-rich granite or granitic pegmatite fragment

Granite; predominantly quartz (SiO₂), feldspar, and minor mica/iron oxides

Likely iron-stained quartz or quartzite

Quartz (SiO₂), possibly quartzite; yellow-brown coloring likely from iron oxides

Quartz Pebble

Silicon Dioxide (SiO2)

Milky quartz (rough quartz-rich rock)

Quartz, silicon dioxide (SiO₂); likely massive milky quartz, possibly quartzite

Mixed quartz gemstone bead bracelet

Quartz, silicon dioxide (SiO₂), in varieties including smoky quartz, amethyst, rutilated quartz, and possibly tourmalinated quartz

Ferruginous Quartz (Iron-stained Quartz)

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

Likely tumbled quartz or calcite

Quartz (SiO₂) or calcite (CaCO₃); exact identification requires hardness and acid tests

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-rich pegmatite

Granitoid pegmatite; predominantly quartz (SiO₂), with abundant feldspar and probable mica

Polished rose quartz slab

Quartz (SiO₂), commonly called rose quartz; minor iron, titanium, or manganese impurities produce the pink color

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Iron-stained quartz-rich rock

Quartz (SiO₂), likely with iron-oxide staining; exact rock type is uncertain from the image

Quartz with iron staining

Silicon dioxide (SiO2)

Quartz and Limestone Grouping

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Milky quartz vein in altered host rock

Quartz (SiO₂), likely with feldspar, mica, and iron-oxide alteration

Quartz Crystal (Rough)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Tumbled quartz (likely milky or included quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Mineral Specimens

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Iron-Stained / Ferruginous Quartz)

Silicon Dioxide (SiO2)

Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)