Peridot
Olivine ((Mg, Fe)2SiO4)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Peridot
Olivine ((Mg, Fe)2SiO4)
Milky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Smoky Quartz in Matrix
Silicon Dioxide (SiO2)
Sunstone
Oligoclase (Plagioclase Feldspar), (Na,Ca)(Si,Al)4O8
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Jasper (River pebble)
Jasper / Silicon Dioxide (SiO2)
Peridot
Olivine (Mg, Fe)2SiO4
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Quartz
Silicon Dioxide (SiO₂)
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Agate Nodule (partially vuggy Quartz)
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Specularite (Specular Hematite)
Iron Oxide (Fe2O3)
Blue Calcite
Calcite (CaCO3)
Precious Opal
Hydrated amorphous silica (SiO2·nH2O)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Diamond (in Jewelry)
Carbon (C)
Quartz with Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate / Chalcedony
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
Grey Agate
Silicon Dioxide (SiO2) - variety: Agate/Chalcedony
Amethyst Geode (Thunderegg)
Silicon Dioxide (SiO2) - Quartz Variety: Amethyst
Dyed Agate Geode (Pink/Magenta)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
Blue Chalcedony Geode (with Quartz Druzy)
Silicon Dioxide (SiO2) - Microcrystalline variety of Quartz
Sardonyx Cameo
Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) - Variety of Chalcedony/Jasper
Dyed Blue Agate (Slab)
Agate (Variety of Chalcedony/Microcrystalline Quartz), SiO2
Smoky Quartz
Silicon Dioxide (SiO2)
Purple Banded Agate
Cryptocrystalline Quartz (SiO2)
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
Milky Quartz
Silicon Dioxide (SiO2)
Fluorite (often referred to casually as 'Fluorspar' in industrial contexts)
Fluorite (CaF2)