Granitic Pegmatite with Tourmaline/Chlorite
Pegmatite
Igneous
Category
Mineral Health
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Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (Iron-rich)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Smoky Quartz (Chlorite Inclusions)
Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Agate (specifically Sardonyx or Red Agate)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite (a calcium-enriched sodic plagioclase feldspar mineral - (Ca, Na)(Al, Si)4O8)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Common Opal (Green Opal / Pistachio Opal)
Hydrated silica (SiO2·nH2O)
mineraloid
Ruby
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Citrine Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Granite
Granite (silica-rich intrusive igneous rock)
igneous
Gneiss
Gneiss
metamorphic
Epidote (Greenstone)
Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)
metamorphic
Pink Granite
Felsic intrusive igneous rock
igneous
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Diorite
Diorite (an intrusive igneous rock)
igneous
Diorite
Phaneritic Intermediate Plutonic Rock
igneous
Vesicular Basalt with Xenocrysts
Mafic Igneous Plutonic/Extrusive Complex
igneous
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz
Silicon dioxide (SiO2)
mineral
Quartz (Chert/Quartzite variant)
Silicon Dioxide (SiO2)
mineral
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz fragment
Silicon Dioxide (SiO2)
mineral
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz fragment
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral