Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Category
Mineraloid (Man Made Origin)
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Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
sedimentary
Osumilite in Granite Matrix
(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30
mineral
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Quartzite
Quartzite (mostly SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartz Druzy Geode
Silicon Dioxide (SiO2) - Crystalline Variety
mineral
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite Pegmatite
Granitic Pegmatite (composition: SiO2 with KAlSi3O8)
igneous
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Basaltic Scoria
Scoria (Vesicular Basalt/Andesite)
igneous
Septarian Nodule (Thunder Egg)
Septarian Concretion (CaCO3 + CaMg(CO3)2 + SiO2)
sedimentary
Dinosaur Bone (Fossilized)
Permineralized Bone (CaCO3 or SiO2 after Hydroxylapatite)
sedimentary
Milky Quartz (with trace inclusions)
Silicon Dioxide (SiO2)
mineral
Quartzite River Rock
Quartzite
metamorphic
Quartzite River Pebbles
Quartzite (primarily SiO2)
Metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Prasiolite and Quartz Crystal Cluster
Quartz (SiO2); Prasiolite is a variety of Quartz
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Banded Agate (specifically Sardonyx)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
mineral
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite (with possible Iron staining)
Meta-orthoquartzite (primarily SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Apache Tear
Obsidian (Hydrated Silica / Amorphous Volcanic Glass)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartz (Quartzite)
Silicon Dioxide (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic