Green Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Mixed: Igneous And Sedimentary
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Learn about Mixed: Igneous And Sedimentary in the encyclopedia
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Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Tumbled Mineral Collection (Amethyst, Celestite, K2 Jasper, Rose Quartz, Ruby in Zoisite, Que Sera Stone)
Mixed Mineral Specimens (Quartz SiO2, Celestite SrSO4, Corundum Al2O3 with Zoisite, etc.)
mineral
Carnelian / Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Pyrite in Quartz Matrix
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian precursor)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Blue sodalite (likely rough fragments)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly mixed with blue calcite or lapis lazuli
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
mineral
Mixed Agate and Lapis Lazuli Bracelet
Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
sedimentary and metamorphic
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Carnelian (Tumbled)
Carnelian (Chalcedony / Silicon Dioxide, SiO2)
mineral
Rhodonite
Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix
mineral
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Polished red jasper
Jasper, microcrystalline quartz (SiO₂), colored by iron oxides and commonly mixed with chalcedony or other minerals
mineral
Dearest Ring (Gemstones)
Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)
mineral
Mookaite Jasper
Siliceous sedimentary rock (variety of Jasper/Chert)
Sedimentary Rock
Shale
Shale
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Ironstone / limonite-rich rock
Limonite, chiefly hydrated iron oxides (FeO(OH)·nH₂O), commonly mixed with goethite and hematite
mineral
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
River Rocks (Polished River Pebbles)
Stream-rounded clastic sediments
Mixed (Sedimentary, Igneous, and Metamorphic)
River Pebbles (Stream-rounded rocks)
Fluvial Detritus (varied mineralogy)
Mixed (predominantly sedimentary and igneous)
Dalmatian Jasper
Aplite with Arfvedsonite inclusions
igneous
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Mica
Mica group (often Muscovite or Biotite)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz Heart or Arrowhead Shape
Silicon Dioxide (SiO2)
mineral
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Man-made material (constructed)
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral