Chert / Flint
Silicon dioxide (SiO2)
Category
Browse organic gemstone (succinite) specimens identified by the Rock Identifier community.
Chert / Flint
Silicon dioxide (SiO2)
Garden Quartz (Lodolite / Inclusion Quartz)
Quartz with inclusions (SiO2 with various mineral inclusions)
Polished moss agate
Moss agate, a variety of chalcedony (microcrystalline quartz, SiO₂)
White seed-bead gemstone strand, likely freshwater pearl or shell pearl
Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Mixed Gemstone and Mineral Collection
Silicon Dioxide (SiO2) based minerals and others
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
Pearl (likely Freshwater or Akoya Cultured)
Aragonite / Conchiolin composite (CaCO3)
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
Jasper
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Pink Opal
Hydrated silica (SiO2 "n H2O)
Pearl necklace
Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2
Amber
Succiniferous fossil resin (C10H16O)
Jasper
Jasper (Silicon Dioxide, SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Picture Jasper
SiO2
Chert (Flint)
Microcrystalline Quartz (SiO2)
Shungite
Non-crystalline carbonoid (Shungite)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
River Jasper (Chert/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
Precious Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Amber (likely a small rough amber piece)
Fossilized plant resin; amber is an organic mineraloid, not a crystalline mineral
Amber
Succiniferous fossil resin (C10H16O)
Amber
Fossilized Tree Resin
Black Jasper
Silicon Dioxide (SiO2) with impurities
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Amber
Succinates (fossilized tree resin), approximately C10H16O
Chert (Brown Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (often called Flint)
Chert (Silicon Dioxide, SiO2)
Elephant Skin Jasper
Microcrystalline Quartz (SiO2)
Red Coral
Corallium rubrum
Mother of Pearl (Nacre)
Calcium Carbonate (Aragonite) with organic conchiolin
Amber with inclusion
Amber (Fossilized Tree Resin)
Jasper
Jasper (Silicon Dioxide, SiO2)