Mineral On Sedimentary Rock

Demitasse Granite (Diorite-Granite transition)

Intermediate Plutonic Rock (Granodiorite/Diorite mix)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Marble

Recrystallized Calcite (CaCO3)

Chert (Arrowhead or Projectile Point)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert

Chert (microcrystalline quartz, SiO2)

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Bumblebee Jasper

Calcite with Arsenic and Manganese oxides (technically a volcanic rock)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Red Jasper (specifically Brecciated Jasper)

Silicon Dioxide (SiO2) with Hematite inclusions

Granodiorite

Granodiorite

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Coquina

Coquina (a type of limestone)

Marble

Recrystallized Calcite (CaCO3)

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2) with limonite/hematite staining

Gold

Native Gold (Au)

Quartz Druzy on Basalt

Silicon Dioxide (SiO2) on Mafic Volcanic Rock

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Granite

Granite (a felsic intrusive igneous rock)

Agate

Silicon Dioxide (SiO2)

Orbicular Granite

Orbicular Granidiorite / Plutonic Igneous Rock

Citrine

Silicon Dioxide (SiO2)

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Milky Quartz (Tumbled Pebble)

Silicon Dioxide (SiO2)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Dendritic Agate

Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Chert (Yellow/Brown variety)

Chert (SiO2)

Limestone

Calcium carbonate ( преимущественно CaCO3)

Chert (Field Stone)

Chert (SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferruginous Oxides

Ferruginous Quartz

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

Porphyritic Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)