Pink Tumbled Agate
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
Pink Tumbled Agate
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2) with impurities
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Tumbled chalcedony (likely milky quartz)
Chalcedony, cryptocrystalline SiO₂; possibly quartz-rich chert
Calcite-rich limestone (possibly fossiliferous limestone)
Calcite, CaCO₃, in a limestone matrix
Banded Black Agate
Silicon Dioxide (SiO2)
Agate
Silicon dioxide (SiO2)
Red Jasper (Chalcedony)
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with impurities
Red Jasper with Quartz Veining
Jasper (Silicon Dioxide, SiO2)
Brown Jasper (Water-worn pebble)
Silicon Dioxide (SiO2) with iron oxide impurities
Jasper
Silicon dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Polished Agate or Jasper-Agate
Silicon Dioxide (SiO2)
Red Jasper
Microcrystalline Quartz (SiO2 with Iron Oxide impurities)
Jasper (Red and Yellow Jasper)
SiO2 (Silicon Dioxide) with Iron Oxide inclusions
Purple Jasper
Silica-rich Microcrystalline Quartz (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with goethite/iron oxide inclusions
Jasper with Quartz (Agate/Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
Jasper
Silicon dioxide (SiO2) with impurities
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Yellow Jasper
Jasper (Silicon Dioxide, SiO2 with iron inclusions)
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
Jasper
Silicon dioxide (SiO2)
Jasper
Silicon dioxide (SiO2) with impurities
Jasper Pebble
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Jasper (Silicon Dioxide) - SiO2
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
Geode
Quartz nodule / Chalcedony-lined cavity
Jasper
Jasper (Silicon Dioxide, SiO2)
Fossilized Coral
Rugosa or Tabulate Coral Fossil (Replacement by Silica/Calcite)
Fossilized Brachiopod
Brachiopoda (likely Order Spiriferida or Productida)
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Polished Ocean Jasper (orbicular jasper)
Siliceous microcrystalline quartz/chalcedony, mainly SiO₂, with iron- and manganese-rich inclusions