Nephrite (a form of Jade)
Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Category
Organic (Often Found By Beachcombers)
Browse organic (often found by beachcombers) specimens identified by the Rock Identifier community.
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
Sedimentary (formed from silica deposits)
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Quartzite (with Metamorphic Foliation)
Quartzite (Recrystallized SiO2)
metamorphic
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert (Grey Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Quartz Geode (partially opened)
Silicon Dioxide (SiO2) with iron staining
mineral
Banded Flint / Chert
Silicon Dioxide (SiO2)
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Goethite/Limonite Iron Ore Node
Goethite (FeO(OH)) or Limonite (mixture of hydrated iron oxides)
mineral
Diorite
Intermediate plutonic igneous rock
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Green Agate
Silicon dioxide (SiO₂)
mineral
Quartzite
Quartzite (SiO2 prominent)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (principally Plagioclase Feldspar and Pyroxene)
igneous
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
metamorphic
Pumice
Pumicite (Amorphous glass with varying chemical composition, often rhyolitic)
Igneous
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Piddock-bored Mudstone
Lutite (Siltstone or Mudstone) with Pholad borings
sedimentary
Scoria (with likely iron oxidation)
Scoria (Basaltic Scoria)
igneous
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Quartzite (River Stone)
Quartzite
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Dragon Stone (Dragon Blood Jasper)
Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Jasper and Aquamarine (likely)
Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))
Sedimentary (Jasper), Mineral (Aquamarine)
Granitic Pegmatite
Pegmatitic Granite
igneous
Jet
Lignite (Anthracite-grade compact coal)
sedimentary