Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Category
Mineral Description (Anthropogenic Material)
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Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Sandstone (SiO2-rich detrital sedimentary rock)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Schist
Schist
metamorphic
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Tumbled honey-colored chalcedony or quartzite
Microcrystalline quartz, SiO₂; exact identification requires testing
mineral
Geode (Unopened)
Silica-rich Concretion (primarily SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow chalcedony (likely citrine or iron-stained quartz)
Microcrystalline quartz, SiO₂; yellow coloration likely from iron oxides or included quartz varieties
mineral
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Rhinestone (or glass crystal)
Silicon dioxide (if glass) / Various
Mineral/gemstone imitation
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Granite
Granite
Igneous
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Thulite in Matrix
Pink Zoisite - Ca2Al3(SiO4)3(OH)
metamorphic
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Mica Schist
Schist
metamorphic
Polished brown mineral fragment, likely quartz-rich iron-stained material
Possibly quartz (SiO₂) with iron-oxide inclusions; exact identification is uncertain from the image
mineral
Schist
Mica Schist
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Chrysocolla in Chalcedony (Gem Silica)
Hydrated copper phyllosilicate and silicon dioxide (SiO2 with (Cu,Al)2H2Si2O5(OH)4)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Porphyritic Basalt or Porphyritic Andesite
Porphyritic volcanic rock
igneous
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Milky Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Orange Calcite (Iron-Stained)
Calcium Carbonate (CaCO3)
mineral
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities), SiO2
mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Mineral