Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
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Chert (Chalcedony / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Tektite
Natural impact glass
meteorite
Chondrite Meteorite
Ordinary Chondrite (OC)
Mineral (Extraterrestrial)
Tumbled amethyst with possible lepidolite/colored quartz companion
Amethyst, purple quartz (SiO₂), likely with iron-related color centers
mineral
Diamond (Faceted)
Carbon (C)
gemstone
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Chert or flint nodule
Microcrystalline quartz (SiO₂), likely chalcedony-rich chert
sedimentary
Chrysocolla-rich copper ore
Chrysocolla, a hydrated copper aluminosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite or turquoise-group minerals
mineral
Agate and Chalcedony Beads
Cryptocrystalline Quartz (SiO2)
gemstone
Rose Quartz
Silicon Dioxide (SiO2) with trace Ti, Fe, or Mn
mineral
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
Metamorphic
Tumbled rutilated quartz bead strand
Quartz, silicon dioxide (SiO₂), containing needle-like rutile inclusions (TiO₂)
gemstone
Tumbled carnelian
Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)
gemstone
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
fossil
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Snakeskin Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Nephrite Jade
Tremolite-Actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert (specifically Jasper or Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Mother of Pearl and Onyx
Aragonite (Mother of Pearl) and Chalcedony (Onyx)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Nuummite
Orthoamphibole (Gedrite-Anthophyllite series)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chert (Commonly called Jasper or Flint)
Chert (SiO2)
sedimentary
Bivalve Fossil (Clam/Mollusk)
Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)
sedimentary
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary
Chert (Jasper variety)
Silicon dioxide (SiO2)
sedimentary
Chert (Chalcedony/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (varietal Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Rounded iron-rich pebble
Likely hematite/goethite-bearing quartzite or ironstone; exact identification requires testing
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Paleoxylon (SiO2)
fossil
Black Obsidian
Obsidian (Volcanic Glass)
igneous