Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
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Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Mahogany Obsidian
Volcanic glass (SiO2 with Fe2O3 inclusions)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Flint
Silicon Dioxide (SiO2) - variety of Chert
sedimentary
Mystic Topaz
Al2SiO4(F,OH)2 (Coated)
gemstone
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)
igneous
Schist
Mica Schist
metamorphic
Granite
Granite (Phaneritic igneous rock)
igneous
Labradorite
(Na,Ca)(Al,Si)4O8
mineral
Flower Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Bloodstone (Heliotrope)
Silicon dioxide (SiO2) with Hematite inclusions
mineral
Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Quartz with Schist Inclusion
Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist
metamorphic
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Vesicular Basalt
Extrusive mafic igneous rock
igneous
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Granite
Granite (Phaneritic Quartz-Feldspar-Biotite rock)
igneous
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
metamorphic
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Dinosaur Bone (Gembone)
Agatized Dinosaur Bone (Silicified Paleo-osteoid)
metamorphic
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Blue Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Basalt with Quartz/Calcite matrix
Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix
igneous
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
sedimentary
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
mineral
Lepidolite in Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 / SiO2
mineral
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral