Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Category
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Fossilized Coral (Petoskey Stone or Rugose Coral)
Antophyllum (Hexagonaria) or Scleractinia (CaCO3)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Shungite
Shungite (Non-crystalline carbon, C)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert
SiO2 (Microcrystalline Quartz)
Chert / Flint
Chert (Microcrystalline Quartz, SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (with Limestone matrix)
Chert (Silica: SiO2)
Chert (Dark Variety / Flint)
Silicon Dioxide (SiO2)
Chert (with Quartz Vein)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
Banded Chert
Silicon dioxide (SiO2) - Microcrystalline Quartz
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
Black Jasper
Silicon Dioxide (SiO2) with Carbonaceous inclusions
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
Chert (Flint variety)
Microcrystalline context of Quartz (SiO2)
Chert with Quartz Veins
Microcrystalline Quartz (SiO2)
Fossilized Shark Tooth
Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron
Chert (Flint)
Microcrystalline quartz (SiO2)
Glauconite (Green Sandstone)
Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Hornblende inclusions
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
Aragonite (Star Cluster or Twinned variety)
Aragonite (Calcium Carbonate, CaCO3)
Amber
Succinite (approximate formula C10H16O)
Moss Agate
Agate (Silicon Dioxide, SiO2) with dendritic inclusions
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Amber
Succinite
Amber (Dark/Black Variety)
Succinite (Resinite), C10H16O
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
Chert (Nodule)
Silicon Dioxide (SiO2)
Chert (with Limestone and Iron Oxide staining)
Cryptocrystalline Quartz (SiO2)
Quartzite and Milky Quartz River Pebbles
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Amber
Succinite (C10H16O)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
Tahitian Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Anthracite Coal
Anthracite (Carbon-based metamorphic rock, 86-97% C)