Spinifex Textured Komatiite
Komatiite (Mg-rich ultramafic volcanic rock)
igneous
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Basalt
Extrusive Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
igneous
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Smoky Quartz with Feldspar
Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)
mineral
Copper-bearing Quartz (likely Chrysocolla or Malachite staining)
Cuprite, Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) or Malachite staining on Quartz/Host Rock
mineral
Kunzite (variety of Spodumene)
Lithium Aluminum Silicate (LiAlSi2O6)
mineral
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Pumice
Vesicular volcanic glass (primarily SiO2 with Al2O3)
Igneous
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Bismuth
Bismuth (Bi)
mineral
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Quartz
Quartz (SiO₂)
Mineral
Scoria (Vesicular Basalt)
Scoria (Vesicular Igneous Rock)
igneous
Red Scoria (Lava Rock)
Scoria (Vesicular Basalt)
igneous
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Lava Rock (Scoria)
Scoria (Vesicular Basalt)
igneous
Epidote in Quartz
Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)
Mineral
Serpentine
Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄
Mineral, often found as a rock (metamorphic)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Biotite or Phlogopite Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Granite
Phaneritic Plutonic Rock (High Silica content)
igneous
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Banded Gneiss
Gneiss
Metamorphic
Basalt
Basalt (comprising plagioclase, pyroxene, and olivine)
igneous
Carnelian
Carnelian (Silica, SiO2)
mineral
Basalt
Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)
igneous
Heulandite with Stilbite
Heulandite-Ca ((Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O) and Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)
mineral
Basalt
Extrusive Mafic Igneous Rock
igneous
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Arsenopyrite with Schist Matrix
Arsenopyrite (FeAsS)
mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Pink Fluorite
Fluorite (Calcium Fluoride) - CaF2
mineral
Red Amber (Burmite/Cherry Amber)
Succinite / Retinite (Organic Fossilized Resin, C10H16O)
Mineraloid (Organic)
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
igneous
Labradorite
Feldspar (variety of Anorthite), (Ca,Na)(Al,Si)4O8
mineral