Red Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye
Category
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Red Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
Propylitic Altered Andesite
Hydrothermally Altered Andesite
Malachite and Azurite on Gossan (Ironstone Matrix)
Cu2CO3(OH)2 (Malachite) on FeO(OH)·nH2O (Limonite/Gossan)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Green Jasper
Microcrystalline Quartz (SiO2) with inclusions
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, and Limestone)
Druzy Quartz (Botryoidal)
Silicon Dioxide (SiO2)
Quartz (Variety: Citrine or Tumbled Chalcedony)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Chert (Jasper)
Silicon Dioxide (SiO2)
Greenstone (Prase / Nephrite / Serpentine mix)
Metamorphosed ultramafic rock / greenstone facies
Milky quartz (likely quartz fragment)
Quartz, silicon dioxide (SiO₂)
Chert
Chert (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions
Quartz
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Fossilized Coral (Petoskey Stone or similar Rugose Coral)
Hexagonaria percarinata (or similar Rugose/Tabulate coral)
Jasper
Silicon dioxide (SiO2)
Rose Quartz
SiO2 (Silicon Dioxide) with traces of titanium, iron, or manganese
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Quartz Pebble
Silicon Dioxide (SiO2)
Chert / Flint
Chert (Cryptocrystalline Quartz, SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Quartz (Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (Chalcedony), SiO2
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide (SiO2) with inclusions
Red Sandstone
Arenite (Ferruginous Sandstone)
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
Chert (Chalcedony/Agate variety)
Silicon dioxide (SiO2)
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
Yellow Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
Flesh-colored Quartzite
Quartzite (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartzite Geode (unopened)
SiO2 (Silicon Dioxide)