Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
sedimentary
Category
Sedimentary (Secondary Mineral) Within Igneous
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Chert (Jasper and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Graphic Granite
Graphic Granite (variety of Pegmatite)
igneous
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Pumice
Pumice (Vesicular volcanic glass / Rhyolite or Trachyte)
igneous
Granodiorite with Biotite Mica
Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite Mica)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper/Quartzite variety)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Nodular Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Brachiopod
Brachiopoda (Class Rhynchonellata or Spiriferida)
sedimentary
Chert (and its variety Flint)
Silicon dioxide (SiO2) / Microcrystalline quartz
sedimentary
Chert (Chert Nodule with Cortex)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Nodule)
Chert (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Chert (Green variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with inclusions
sedimentary
Chert (Jasper/Quartzite)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Lepidolite (likely)
K(Li,Al)3(Al,Si)4O10(F,OH)2 (Phyllosilicate mineral, part of the mica group)
Mineral
Schist
Mica Schist
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Folded Schist / Gneiss (Metamorphic Rock)
Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)
metamorphic
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Mineral in Metamorphic/Igneous Host
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Azurite Geode
Azurite (Cu3(CO3)2(OH)2)
mineral
Chert (specifically Jasper or Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert
Microcrystalline silica (SiO2)
sedimentary
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Septarian Nodule (Dragon Stone)
Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)
sedimentary