Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Category
Multiple
Browse multiple specimens identified by the Rock Identifier community.
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Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Mixed river pebbles (gravel)
Polymictic alluvial gravel; diverse clasts, likely including quartz, feldspar-rich granitoids, and metamorphic rocks
sedimentary
Likely gray granite or gneiss fragment
Granite: quartz, feldspar, and mica; possibly banded gneiss if foliation is present
igneous
Quartzite river pebble
Quartzite (SiO2)
metamorphic
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Lapis Lazuli (in Matrix)
Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2
metamorphic
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Quartzite pebble
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Botryoidal Hematite (Kidney Ore)
Iron(III) oxide (Fe2O3)
mineral
Mixed Tumbled Stones Collection
Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)
multiple
Fossil crocodilian skull and jaws
Crocodyliform fossil; exact genus and species cannot be determined from the image
fossil
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Unidentifiable blurred specimen
Cannot be determined from the image
mineral
Uncertain polished mineral specimen
Indeterminate; possibly quartz or feldspar with iron-oxide staining
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Mixed gravel and mineral fragments
Polymictic unconsolidated sediment; likely quartz, feldspar, chert, mica, and lithic fragments
sedimentary
Quartzite Pebble
Meta-quartzite (SiO2)
metamorphic
Quartz with Mafic/Chlorite Veins
Silicon Dioxide (SiO2) with Chlorite/Epidote cross-veining
metamorphic
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Quartzite River Pebble
Quartzite (comp: SiO2)
metamorphic
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Quartzite pebble
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite Cobble
Metamorphic Rock (SiO2 dominated)
metamorphic
River-rounded landscaping pebbles
Mixed alluvial gravel; commonly quartzite, granite, basalt, sandstone, and quartz
sedimentary
Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper (likely Polychrome or Ocean Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Mixed collection of common river stones
Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material
igneous, sedimentary, metamorphic
Polymictic conglomerate
Conglomerate; clast-supported polymictic conglomerate in a dark matrix
sedimentary
Mixed river gravel (alluvial conglomeratic sediment)
Polymictic alluvium; composition includes quartz, feldspar, chert, granite, basalt, and metamorphic rock fragments
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartzite (River Cobble)
SiO2 (Quartz-rich Metamorphic Rock)
metamorphic
River Quartzite Slik
Quartzite (SiO2)
metamorphic
Quartzite pebble
Quartzite (SiO2)
metamorphic
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral