Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Category
Organic (Often Found By Beachcombers)
Browse organic (often found by beachcombers) specimens identified by the Rock Identifier community.
Learn about Organic (Often Found By Beachcombers) in the encyclopedia
View all →
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Amber
Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)
mineral
Red Jasper
Quartz (SiO2) with iron oxide inclusions
sedimentary
Amber
Succinite (C10H16O)
gemstone
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Mineral
Amber
Succinite (fossilized resin)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Zebra Marble
Metamorphosed Limestone (Recrystallized Calcite)
metamorphic
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
sedimentary
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Orthoceras Fossil Limestone
Orthoceras (extinct Cephalopod fossil) in Matrix
sedimentary
Coquina / Shelly Limestone
Coquina (Biogenic Limestone)
sedimentary
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
sedimentary
Chert (specifically White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Jasper blend)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert Arrowhead (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Field Stone)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (White Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Ambergris (Sea Wax)
Physeter macrocephalus fecalith
Organic geological/oceanic specimen
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chert (and/or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and associated river cobbles)
Silicon dioxide (SiO2)
sedimentary
Anthracite Coal
Anthracite
metamorphic
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
sedimentary/mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Chert (specifically Tan/Yellow Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint or Jasperoid)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
Carbonaceous Chondrite (CV3 type)
Carbonaceous Chondrite (CV3 group)
meteorite
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Chert (Jasper/River Stone)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Fossil Shark Tooth
Carcharadon sp. (likely Carcharodon carcharias or similar Lamniformes)
fossil
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
mineral