Metamorphic Rock (Variety Of Quartz)

Quartzite Pebble

Quartzite (composed primarily of Silica, SiO2)

Leopardskin Jasper

Jasper (a variety of microcrystalline Quartz)

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

Quartz / Quartzite

Silicon Dioxide (SiO2)

Quartzite with Iron Inclusions

Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Chakra Stone Bracelet (mixed gemstones)

Multi-mineral/Gemstone assembly (primarily Quartz variety beads)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite Pebbles

Meta-quartzite (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Tree Agate (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Amygdaloidal Rhyolite

Amygdaloidal Rhyolite (Felsic volcanic rock)

Cloudy Quartz (or Milky Quartz)

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate slice)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Milky Quartz

Silicon Dioxide (SiO2)

Granitic Pegmatite

Granitic Pegmatite with Quartz and Feldspar

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Agate Geode / Thunderegg

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Unakite

Epidotized Granite

Amethyst

SiO2 (Silicon Dioxide) - a variety of Quartz

Quartzite (specifically a river-worn pebble)

Quartzite (primarily SiO2)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Serpentine

Antigorite / Lizardite / Chrysotile (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Jasper and Agate

Microcrystalline Quartz (SiO2)

Chert (Quartz Variety)

Chert (Silicon Dioxide, SiO2)

Chert (Flint Nodular Variety)

Microcrystalline Quartz (SiO2)

Rose Quartz

Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese

Pyrite

Iron Sulfide (FeS2)

Tiger's Eye (Unpolished)

Pseudomorph of Quartz after Crocidolite (SiO2)

Jasper

Jasper (Silica/Quartz) - SiO2

Banded Gneiss

Gneiss