Yellow Agate
Agate (Varietal form of Chalcedony/Quartz, SiO2)
Category
Browse metamorphic and sedimentary specimens identified by the Rock Identifier community.
Yellow Agate
Agate (Varietal form of Chalcedony/Quartz, SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
White Calcite
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Pyrite
Iron Sulfide (FeS2)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Pyrite in Shale
Iron Sulfide (FeS2)
Pyrite in Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
Schist
Mica Schist
Banded Marble
Recrystallized Calcite (CaCO3)
Quartzite
Quartzite (SiO2)
Biotite Schist
Biotite Mica Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
Gneiss
High-grade metamorphic rock (Gneiss)
Yellow Aventurine (or Citrine-colored Quartz)
Silicon Dioxide (SiO2) with inclusions
Gneiss (Banded Gneiss)
Gneiss
Banded Slate (Sedimentary Pebble)
Slate (Metamorphosed Shale or Mudstone)
Kyanite in Quartz
Al2SiO5 in SiO2
Siltstone or Fine-grained Sandstone pebble
Siltstone (primarily SiO2 with clay minerals)
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneiss
Black Agate
Silicon Dioxide (SiO2) with carbon/iron inclusions
Quartz Sand Gravel
Silicon Dioxide (SiO2)
Kyanite
Kyanite (Al2SiO5)
Yellow Quartzite Pebble
Quartzite (SiO2)
Greenstone (Epidosite / Chlorite Schist)
Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) or Chlorite)
Greenschist
Chlorite schist
Phyllite
Phyllite
Milky Quartz
Silicon Dioxide (SiO2)
Greenstone
Greenschist / Meta-basalt
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
Marble
Recrystallized Calcite (CaCO3)
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
Marble
Recrystallized Calcite / Dolomite (CaCO3)
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
Gneiss
Gneiss
Marble
Metamorphosed Limestone (CaCO3)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)