Metamorphic Rock (Variety Of Quartz)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Quartz-rich rock or quartz specimen

Quartz (SiO₂), likely massive quartz or quartz-bearing host rock

Greenstone / Serpentinite

Antigorite/Lizardite series (Mg,Fe)3Si2O5(OH)4

Milky Quartz

Silicon dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz / Quartz Crystal)

Silicon Dioxide (SiO2)

Tumbled quartzite pebble

Quartzite; predominantly microcrystalline quartz (SiO₂)

Tumbled smoky quartz (probable)

Quartz, silicon dioxide (SiO₂), smoky variety

Rounded quartz-veined pebble

Likely quartz-veined metamorphic rock; exact host rock is indeterminate from the image

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Mixed tumbled rock and mineral collection

Varied specimens, including probable quartz varieties, jasper, agate, fluorite, rose quartz, amethyst, pyrite, calcite, and others

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Quartz / Quartzite

Quartz (Silicon Dioxide, SiO2)

Mixed tumbled stones

Mixed aggregate of quartz, chalcedony, jasper, feldspar, and other common silicate minerals

Quartzite (River Pebble)

Quartzite (SiO2)

Tumbled dalmatian jasper (likely)

Microcrystalline quartz/chalcedony with black amphibole or aegirine inclusions; commonly sold as “dalmatian jasper”

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

White quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly quartz (SiO₂), possibly with minor feldspar, mica, and iron-oxide staining

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite (mostly SiO₂), possibly micaceous quartzite or quartz-rich schist

Quartzite

Metamorphic rock predominantly composed of Quartz (SiO2)

Weathered quartz-rich metamorphic rock, likely gneiss or quartzite

Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph

Polished brecciated jasper

Jasper: microcrystalline quartz (SiO₂) with iron-oxide and other mineral inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Agate

SiO2 (Silicon dioxide, chalcedony variety)

Tumbled jasper pebble

Silica-rich microcrystalline quartz/chalcedony, commonly brecciated or iron-stained jasper (SiO₂)

Quartzite (Pink/Red variety)

Quartzite (SiO2 with iron oxide impurities)

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Quartz with dark inclusions

Quartz, silicon dioxide (SiO₂), likely included or milky quartz

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Metamorphic Rock

Quartz-veined Schist or Gneiss

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

Quartz

Silicon Dioxide (SiO2)

Likely quartz-rich rock fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or a quartz-bearing stone

Milky Quartz

Silicon Dioxide (SiO2)

Blue-gray quartz-rich rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar

Coarse-grained metamorphic rock, likely gneiss

Granitic gneiss; typically quartz + feldspar + biotite/hornblende

Small rounded pebble, likely quartz-rich stone

Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble

Red jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides