Quartz
Silicon dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Quartz
Silicon dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Chert (variations include Flint or Jasper)
Cryptocrystalline Quartz (SiO2)
Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
Milky Quartz (among River Rock)
Quartz (Silicon Dioxide, SiO2)
Gold Nugget
Native Gold (Au)
Banded Chert
Microcrystalline Quartz (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Amethyst (Tumbled Chips)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gold
Native Gold (Au)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 principal component)
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Green Opal
Hydrated Silica (SiO2·nH2O)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Quartz (Druzy or Crystalline variety)
Silicon Dioxide (SiO2)
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz Geode (River Cobble)
Silicon Dioxide (SiO2)
Quartz / Quartzite
Silicon Dioxide (SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Pyrite (locally known as Fool's Gold)
Iron Sulfide (FeS2)
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
Gold Nugget
Native Gold (Au)
Milky Quartz
Silicon Dioxide (SiO2)