Green Quartz (likely Aventurine or Prasiolite)
Silicon Dioxide (SiO2) with inclusions
Category
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Green Quartz (likely Aventurine or Prasiolite)
Silicon Dioxide (SiO2) with inclusions
Aura Quartz (Titanium/Bismuth Coated)
Silicon Dioxide (SiO2) with metallic vapor coating
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Blue Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial pigment
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Chalcedony
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Agate
SiO2
Banded Agate (Carnelian type)
Agate (Cryptocrystalline Quartz, SiO2)
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
Quartz (Granular)
Silicon Dioxide (SiO2)
Pyrite Geode (Sparkling Druzy)
Iron Sulfide (FeS2) in Sedimentary Nodule
Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Milky Quartz
Quartz (SiO2) with iron staining
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Quartz (Smoky or Clear variety with inclusions)
Silicon Dioxide (SiO2)
Smoky Quartz with Chert
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Dyed Agate
SiO2 (Silicon Dioxide)
Dyed Agate
Agate (Silicon dioxide)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Blue Lace Agate (often dyed)
Silicon dioxide (SiO2) - variety of chalcedony
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Agate Geode
Microcrystalline Quartz (SiO2)
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)
Nuummite
Nuummite (intergrowth of orthoamphiboles Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
Pyritic Quartzite
Metequartzite with FeS2 (Pyrite) inclusions
Gneiss (likely Granitic Gneiss)
Gneiss
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Turquoise (with Hematite)
CuAl6(PO4)4(OH)8·4H2O
Obsidian
Obsidian (Volcanic glass), SiO2 (70% or more)
Sandstone Pebbles
Arenite
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
Petrified Wood
Silicified Wood (SiO2)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Mahogany Obsidian
Obsidian (volcanic glass with hematite/magnetite inclusions)
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)