Blue Agate (likely dyed)
Silicon Dioxide (SiO2)
Category
Browse mineral (specifically a variety of quartz) specimens identified by the Rock Identifier community.
Blue Agate (likely dyed)
Silicon Dioxide (SiO2)
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Moonstone
Adularia (Potassium Aluminum Silicate, KAlSi3O8)
Moonstone (specifically Cat's Eye or Gray Moonstone)
Orthoclase (Potassium Aluminum Silicate) with the formula (K,Na)AlSi3O8
Jasper with Iron Inclusions
Silicon Dioxide (SiO2) with impure Iron Oxides
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
Amazonite
K(AlSi3O8) - Microcline variant
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
Green Calcite
Calcium Carbonate (CaCO3)
Que Sera Stone (Llanite)
Rhyolite containing blue quartz and feldspar
Rose Quartz
SiO2 (Silicon Dioxide)
Bloodstone (Heliotrope)
Chalcedony (SiO2) with inclusions of Iron Oxide or Red Jasper
Graphic Granite
Graphic Granite (variety of Pegmatite)
Chlorastrolite (Isle Royale Greenstone)
Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O
Ironstone Concretion (Moqui Marble)
Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
Green Calcite
Calcium Carbonate (CaCO3)
Orange Calcite (Carved as a Horned Skull)
Calcium Carbonate (CaCO3)
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
Yellow Quartz / Quartz Pebble
Silicon Dioxide (SiO2)
Carnelian
Carnelian (Silicon Dioxide: SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint or Novaculite variant)
Chert (Microcrystalline Quartz, SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Black Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartzite (specifically Pink or Red Quartzite)
Metamorphosed Quartz Sandstone (SiO2)
Mahogany Obsidian
Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)
Basalt River Stone
Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)
Jasper
Silicon Dioxide (SiO2) with impurities
Amazonite
Potassium Feldspar (KAlSi3O8), specifically Microcline
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Jasper (likely a variety of Brecciated Jasper or a patterned variety)
Silicon dioxide (SiO2)
Amazonite
Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)
Rose Quartz
Silicon Dioxide (SiO2)