Man Made Glass (Often Grouped With Minerals In Lapidary)

Obsidian

Volcanic glass (SiO2-rich)

Sandstone

Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

Druzy Quartz

Silicon Dioxide (SiO2)

Unakite / Epidosite

Epidote with Orthoclase and Quartz; (Ca2(Al2,Fe)(SiO4)3(OH)) / (KAlSi3O8) / (SiO2)

Quartzite

Quartzite (SiO2 silicon dioxide)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (or Agate/Quartzite)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)

Cryptocrystalline Quartz (SiO2) with inclusions

Red Jasper

Silicon Dioxide (SiO2)

Unakite (bottom) and Sodalite (top)

Epidotized Granite (Unakite) and Sodium Aluminum Silicate Chloride (Sodalite)

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Ocean Jasper

Orbicular Jasper (variety of Chalcedony - SiO2)

Chert (Banded)

Microcrystalline Quartz (SiO2)

Quartz with Pyrite inclusions

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Jasper

Silicon dioxide (SiO2)

Chert (Jasper influence)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or River Stone)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (Siltstone-Chert mixture)

Microcrystalline Quartz (SiO2)

Iron-stained Quartzite

Metamorphic Quartz (SiO2) with limonite/hematite staining

Obsidian

Obsidian (Volcanic Glass)

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Sandstone Concretion

Septarian Concretion (Nodule)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Chert (Cherty Pebble)

Silicon Dioxide (SiO2)

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Fluorite

Calcium fluoride, CaF2

Jasper

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Jasper (Chert)

Silicon Dioxide (SiO2)

Chrysoprase

Chalcedony (cryptocrystalline SiO2 variety)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Flint)

Microcrystalline Quartz (SiO2)

Blue Quartzite (River Pebble)

Quartzite (primarily SiO2 with Dumortierite or Crocidolite inclusions)

Quartzite River Stone

Metamorphosed Quartz-rich Sandstone (SiO2)

Jasper (Liver Jasper or Chocolate Jasper)

Jasper (Silicate - SiO2)

Yellow Jasper

Opaque Cryptocrystalline Quartz (SiO2)

Chert Pebble

Microcrystalline Quartz (SiO2)

Green Jasper

Jasper (Silicates, SiO2)