Sedimentary (Secondary Mineral) Within Igneous

Copper Ore (Malachite and Limonite bearing rock)

Copper-bearing rock with secondary copper minerals

Strawberry Quartz (or Hematoid Quartz)

Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite

Amethyst (Pale/Light Variety)

Quartz (Silicon Dioxide) with Iron impurities - SiO2

Sodalite Syenite

Sodalite-bearing Syenite (Na8(Al6Si6O24)Cl2)

Granite

Granite

Quartz pebble

Silicon dioxide (SiO2)

Sapphire

Corundum (Al2O3)

Banded Chert

Cryptocrystalline Quartz (SiO2)

Quartz / Rose Quartz

Silicon Dioxide (SiO2)

Amazonite

Potassium Feldspar (KAlSi3O8) with lead impurities

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Nuummite

Nuummite (intergrowth of orthoamphiboles Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

River Pebble (likely Quartzite or Chert)

Sedimentary Clast (Silicon Dioxide dominant)

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Sandstone

Arenite (primarily SiO2)

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2 with inclusions)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions

Carnelian

SiO2 (Silicon Dioxide) - Translucent Chalcedony

Agate Nodule (partially vuggy Quartz)

Silicon Dioxide (SiO2)

Vuggy Chert / Silicified Limestone

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Chert (Flint) with Iron Staining

Microcrystalline Quartz (SiO2)

Pyrite

Iron sulfide (FeS2)

Carnelian (Agate / Chalcedony)

Silicon Dioxide (SiO2) - Iron-stained Chalcedony

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Pegmatite

Igneous Pegmatite

Calcite

Calcite (Calcium Carbonate, CaCO3)

Septarian Nodule (Yellow Calcite in Limestone)

Septarian Concretion (CaCO3 with Aragonite and Calcite)

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Amethyst

Silicon dioxide (SiO2) with iron impurities

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Quartz Pebble

Silicon Dioxide (SiO2)

Bornite

Bornite (Cu5FeS4)

Pegmatite

Igneous Pegmatite

Blue Howlite (Dyed)

Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Crystal (Amethyst)

Silicon Dioxide (SiO2)

Quartz with Mica

Silicon Dioxide (SiO2) with Mica group inclusions