Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
The Purple Specimen Is A Mineral (Amethyst); The White Specimen Is A Sedimentary Rock (Limestone Or Marble).
Browse the purple specimen is a mineral (amethyst); the white specimen is a sedimentary rock (limestone or marble). specimens identified by the Rock Identifier community.
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Cloudy Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Limonite inclusions
sedimentary
Zebra Jasper
Tumbled Opaque Chalcedony (SiO2)
sedimentary
Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gold Ore in Quartz
Auriferous Quartz (Au + SiO2)
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO2)
metamorphic
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Quartz Crystal Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Unidentifiable Rock Fragment
Uncertain
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
metamorphic
Red Quartzite (likely Purple/Red variety)
Quartzite (SiO2)
metamorphic
Limestone
Calcareous Sedimentary Rock (CaCO3)
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Pyrite
Pyrite (FeS2)
Mineral
Granite (Polished Pebble)
Phaneritic Plutonic Rock (primarily Orthoclase and Quartz)
igneous
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Jasper variety)
Chert (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Gravel Bit)
Microcrystalline silica (SiO2)
sedimentary
Granite Pebble
Granite (Felsic Plutonic Rock)
igneous
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary