Ambergris
Ambra grisea
Category
Browse organic (often found by beachcombers) specimens identified by the Rock Identifier community.
Ambergris
Ambra grisea
Ambergris
Ambrein (C30H52O Derivative)
Stiped Slate Beach Pebble
Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)
Sea Glass (Kelly Green)
Amorphous Silica (Silicon Dioxide with Iron/Chromium additives)
Sandstone Pebble with Iron Staining
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)
Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)
Silicon Dioxide (SiO2) with impurities
Garnetiferous Quartzite (Garnet Gneiss Pebble)
Garnet-bearing Quartzite or Quartz-Feldspar Gneiss
Sea Glass (often mistaken for Gemstones)
Amorphous Silica (SiO2) with trace additives
Cat's Eye Shell (Shiva Shell)
Operculum of the Turbo petholatus (Tapestry Turban Snail), predominantly Calcium Carbonate (Aragonite)
Quartz (Beach Pebble)
Silicon Dioxide (SiO2)
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
Riverstone Jasper (Chert variant)
Silicon Dioxide (SiO2)
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Yellow Quartz (Citrine Quartz or Yellow Jasper)
Silicon Dioxide (SiO2) with iron impurities
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
Chert (Heart-shaped Pebble)
Cryptocrystalline quartz (SiO2)
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Quartz Vein in Gneiss or Basalt
Milky Quartz (SiO2) within Metamorphic Host Rock
Quartz Veined Basalt Pebble
Amygdaloidal Basalt with Quartz (SiO2) veining
Hag Stone (Banded Chert or Limestone with Borehole)
Microcrystalline Quartz (Chert) or Calciferous Siltstone (CaCO3/SiO2)
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
Sea Glass
Amorphous Silica (Anthropogenic glass) - SiO2
Jasper
Silicon dioxide (SiO2) with iron inclusions
Flowerstone
Porphyritic Basalt or Porphyritic Andesite
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
Septarian Nodule (Dragon Stone)
Septarian Geode (CaCO3 + Mg + Fe)
Aluminum Slag
Anthropogenic Aluminum (Al)
Ferruginous Quartzite (also known as Ironstone or Gossan)
Ferruginous Quartzite with Goethite/Hematite staining
Basalt with Quartz/Epidote Vein
Mafic volcanic rock (formula primarily (Mg, Fe)2SiO4 and CaAl2Si2O8)
Quartz Geode
Silicon Dioxide (SiO2)
Jasper (Multi-colored) / Sea Glass Slag
Silicon Dioxide (SiO2) with impurities of Iron Oxide
Gold Nugget
Native Gold (Au)
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
Amber
Resinite / Fossilized Tree Resin
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
Amber
Succinite (C10H16O)
Kidney Stone
Calcium Oxalate (CaC2O4), Uric Acid, or Struvite
Horse Chestnut (Buckeye seed)
Aesculus hippocastanum seed
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
Fossiliferous Limestone
Fossiliferous Limestone