Epidote in Quartz
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Quartz (SiO2)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper (Epidote with Piedmontite or Quartz)
Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
metamorphic
Basalt with Sulfide/Pyrite inclusion
Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Porphyritic Andesite
Andesite
igneous
Crushed Granite Gravel
Granite (Plagioclase feldspar, Quartz, Alkali feldspar, Biotite)
igneous
Amygdaloidal Basalt with Secondary Minerals
Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)
igneous
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral
White Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Igneous
Granite
Phaneritic Plutonic Felsic Rock (KAlSi3O8 + SiO2 + NaAlSi3O8)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Dark gray weathered pebble, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine or iron oxides
igneous
Basalt with Epidote Veining
Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Banded Gneiss
Banded Gneiss (High-grade Metamorphic Rock)
metamorphic
Moss Agate
Silicon dioxide (SiO2) with inclusions
Mineral
Blue Topaz
Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)
gemstone
Mica Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Snowflake Obsidian
Volcanic Glass (SiO2 with Cristobalite inclusions)
igneous
Chalcedony with Quartz Crystals
Silicon Dioxide (SiO2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Bloodstone
Heliotrope (Cryptocrystalline Quartz, SiO2)
mineral
Quartzite with Mica / Gneiss Pebble
Metamorphic Rock (Quartz-Feldspar-Mica aggregate)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Porphyritic Basalt
Porphyritic Basalt (with Plagioclase and Augite phenocrysts)
igneous
Granite
Granite
igneous
Limestone with Iron Inclusions
Calcium Carbonate (CaCO3) with Hematite/Limonite
sedimentary
Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Mineral-based Sedimentary/Silica
Druzy Quartz on Quartz Base
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gneiss (Hornblende/Biotite Gneiss)
Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Blue Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
gemstone
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral