Quartzite Pebble rock specimen

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

metamorphic

Diabase (also known as Dolerite) rock specimen

Diabase (also known as Dolerite)

Diabase

igneous

Conglomerate rock specimen

Conglomerate

Conglomerate (Sedimentary Clastic Rock)

sedimentary

Amber rock specimen

Amber

Succinite

Mineraloid

Red Jasper rock specimen

Red Jasper

Silicon dioxide (SiO2) with hematite impurities

sedimentary

Milky Quartz Pebble rock specimen

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral

Quartzite pebble rock specimen

Quartzite pebble

Metamorphic Quartz (SiO2)

metamorphic

Diorite rock specimen

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous

Diorite (Dalmatian Stone variant) rock specimen

Diorite (Dalmatian Stone variant)

Phaneritic Plutonic Igneous Rock (Medium to Fine-grained Diorite)

igneous

Diorite rock specimen

Diorite

Diorite

igneous

Jasper and Basalt Mix (Dark Chert/Basalt River Pebble) rock specimen

Jasper and Basalt Mix (Dark Chert/Basalt River Pebble)

Silicon Dioxide (SiO2) or Mafic extrusive igneous rock

sedimentary or igneous

Yellow Quartz (Citrine or Iron-Stained Quartz) rock specimen

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

mineral

Amber rock specimen

Amber

Succinite (Fossilized Resin)

mineral

Red Jasper (Polished) rock specimen

Red Jasper (Polished)

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary

Jasper rock specimen

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

sedimentary

Red Jasper (River Siltstone) rock specimen

Red Jasper (River Siltstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Smoky Quartz rock specimen

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Chalcedony in Host Rock rock specimen

Chalcedony in Host Rock

Silicon Dioxide (SiO2)

mineral

Copper-bearing Quartz (likely Malachite on Quartz matrix) rock specimen

Copper-bearing Quartz (likely Malachite on Quartz matrix)

Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)

mineral

Chalcedony (Quartz variety) rock specimen

Chalcedony (Quartz variety)

Silicon Dioxide (SiO2)

mineral

Aquamarine (Rough) rock specimen

Aquamarine (Rough)

Beryl (Be3Al2Si6O18)

mineral

Chert (Yellow Jasper variant) rock specimen

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

sedimentary

Yellow Jasper rock specimen

Yellow Jasper

Silicon Dioxide (SiO2) - variety Jasper

sedimentary

Amethyst rock specimen

Amethyst

Silicon Dioxide with iron impurities (SiO2)

mineral

Tiffany Stone rock specimen

Tiffany Stone

Bertrandite (with Fluorite, Opal, and Chalcedony), Be4Si2O7(OH)2

mineral

Sandstone (Ferruginous) rock specimen

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

sedimentary

Chert (White Chert/Flint) rock specimen

Chert (White Chert/Flint)

Chert (SiO2)

sedimentary

Quartzite rock specimen

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

metamorphic

Sandstone rock specimen

Sandstone

Clastic sedimentary rock (primarily SiO2)

sedimentary

Gneiss rock specimen

Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Quartzite rock specimen

Quartzite

Quartzite (SiO2)

metamorphic

Sandstone (likely River-tumbled Picture Sandstone) rock specimen

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

sedimentary

Olivine (Peridot) rock specimen

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Mineral

Jasper rock specimen

Jasper

Jasper (Silica-rich Microcrystalline Quartz, SiO2)

sedimentary

Greywacke (River Siltstone) rock specimen

Greywacke (River Siltstone)

Lithic Wacke (Sandstone subfamily)

sedimentary

White Quartz Pebbles rock specimen

White Quartz Pebbles

Quartz (Silicon Dioxide, SiO2)

Mineral

Basalt rock specimen

Basalt

Basalt (Vitreous to Aphanitic Mafic Igneous Rock)

igneous

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Milky Quartz rock specimen

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Amygdaloidal Basalt rock specimen

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

igneous

Diorite (River Cobble) rock specimen

Diorite (River Cobble)

Intrusive Igneous Diorite

igneous

Jasper with Dendritic Inclusions rock specimen

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary