Green Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Mineral (Man Enhanced)
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Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
sedimentary
Granite Gneiss
Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)
metamorphic
Phyllite (possibly low-grade greenish slate)
Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula
metamorphic
Likely calcite fragment
Calcite (CaCO₃), possibly limestone or marble
mineral
Weathered iron-rich rock, possibly jasper or ironstone
Likely limonite/goethite-bearing siliceous rock; exact identification requires hardness and streak tests
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Fluorite Cleavage Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Small seashell fossil or shell fragment
Likely calcium-carbonate shell material, chiefly aragonite or calcite; exact species indeterminate
fossil
Fossilized Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Pink Feldspar
Orthoclase (KAlSi3O8) or Microcline
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Serpentinite (likely)
Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)
metamorphic
Polished ocean jasper (orbicular jasper), likely
Silica-rich microcrystalline quartz/chalcedony aggregate, commonly with feldspar, epidote, and iron oxides; composition varies
igneous
Weathered iron-rich concretion (probable limonite/goethite)
Limonite–goethite aggregate, approximately FeO(OH)·nH₂O
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Limonite) inclusions
mineral
Quartz
Quartz (SiO₂)
Mineral
Botryoidal Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear quartz crystal point
Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal
mineral
Fluorite (Green)
Calcium Fluoride (CaF2)
mineral
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Tumbled White Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Tumbled orange agate or carnelian
Microcrystalline quartz (chalcedony), SiO₂; orange coloration commonly from iron oxides
gemstone
Limonite (Iron-rich Siltstone / Sandstone base)
Hydrous ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Purple fluorite cluster with metallic sulfide inclusions
Fluorite, calcium fluoride (CaF₂), likely with pyrite or chalcopyrite inclusions
mineral
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Tumbled pale quartz/chalcedony fragment
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride) - CaF2
mineral
Limonite (often after Pyrite)
Limonite (FeO(OH)·nH2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Tumbled metallic sulfide mineral specimen, likely pyrite-bearing ore
Likely pyrite (FeS₂) with associated sulfides and host rock; exact identification requires testing
mineral