Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Man Made Silicate (Anthropogenic Glass)
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Libyan Desert Glass
Impactite silica glass (SiO2)
tektite (impact glass)
Quartzite (specifically Pink or Red Quartzite)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Jasper (possibly Wonderstone)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)
igneous
Citrine
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Chert (Chert / Flint nodule)
Silicon Dioxide (SiO2)
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Diamond
Diamond (pure carbon C)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Snowflake Obsidian
Volcanic glass with Phenocrysts (SiO2 with Cristobalite inclusions)
igneous
Bloodstone Jasper (Heliotrope)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
sedimentary
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Mineral
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)
Chert (microcrystalline quartz)
Metamorphic Rock
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Mineral
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Obsidian (in jewelry setting)
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
igneous
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Quartz Geode/Druzy Quartz
Quartz (SiO₂)
Mineral
Chert (with Chalky Cortex)
Silicon Dioxide (SiO2)
sedimentary
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
igneous
Quartz Geode/Cluster
Quartz (SiO2)
mineral
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
igneous