Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Category
Igneous And Sedimentary
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Epidote
Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))
metamorphic
Gneiss
Gneiss
metamorphic
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon dioxide (SiO2)
mineral
Foliated metamorphic rock, likely gneiss or mica schist
Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph
metamorphic
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite or Granitic Gneiss
Granitoid / Gneiss
Igneous / Metamorphic
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with Iron Oxide / Chlorite inclusions
mineral
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Quartz Crystal (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Quartz Druzy (on Geode Fragments)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Moonstone variant or White Agate)
Silicon Dioxide (SiO₂)
mineral
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Dyed Agate and Citrine-style Quartz)
Silicon Dioxide (SiO2)
gemstone
Ruby Zoisite
Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)
metamorphic
Red Agate
Chalcedony (SiO2)
gemstone
Auriferous Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Yellow Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
mineral
Gneiss
Gneiss
metamorphic
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Banded dark pebble (likely gneiss or banded metamorphic rock)
Indeterminate from the image; possibly banded gneiss
metamorphic