Milky quartz-bearing rock
Quartz (SiO₂), likely massive milky quartz; possibly quartz-rich pegmatite
mineral
Category
Man Made Mineral Simulant (Glass)
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Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)
Quartz–feldspar–mica rock; exact identification requires testing
metamorphic
Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
metamorphic
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Quartz geode
Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz Crystal in Matrix
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related)
Volcanic Glass (70% or more SiO2)
igneous
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions/staining (Limonite/Hematite)
Mineral
Jasper-Agate
Silicon Dioxide (SiO2)
sedimentary
Chert (or Limestone)
Sedimentary Cryptocrystalline Quartz (SiO2) or Calcium Carbonate (CaCO3)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Milky Quartz (Beach Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond
Carbon (C)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz geode (likely amethyst-bearing)
Silica geode; quartz, SiO₂, with possible amethyst and minor iron oxides
mineral
Quartz with Iron Oxide Inclusions
Silicon dioxide with limonite/hematite (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silica (SiO2)
mineral
Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Milky Quartz Pebble with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
sedimentary
Fluorite (Green Fluorite on Host Rock)
Fluorite (Calcium Fluoride, CaF2)
mineral
Mahogany Obsidian
Volcanic Glass (Silicate: SiO2 + Fe2O3)
igneous
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Iron-stained quartz-bearing rock
Quartz (SiO₂), likely in a limonite/goethite-rich matrix
mineral
Sandstone
Arenite (SiO2 based typically)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite
mineral