Mineral (Man Modified)

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Jasper with Purple Fluorite or Chalcedony

Silicon Dioxide (SiO2) with mineral inclusions

White calcite (likely tumbled calcite or marble fragment)

Calcite, calcium carbonate (CaCO₃); if the specimen is granular and rock-like, it may be marble, a calcite-rich metamorphic rock

Unidentified translucent mineral fragment, possibly calcite

Calcite (calcium carbonate, CaCO₃), tentative identification

Ferruginous Quartz (Iron-stained Quartz)

Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)

Quartz (Clear or Smoky)

Silicon Dioxide (SiO2)

Tumbled howlite (likely)

Howlite, Ca₂B₅SiO₉(OH)₅

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Fluorite

Calcium Fluoride (CaF2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Fluorite (Blue)

Calcium Fluoride (CaF2)

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay inclusions

Limonite (Ironstone Concretion)

Limonite (FeO(OH)·nH2O)

Rounded basalt pebble

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine

Fluorite

Calcium Fluoride (CaF2)

Fluorite on Matrix

Calcium Fluoride (CaF2)

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Fluorite

Calcium Fluoride (CaF2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)

Fluorite

Calcium Fluoride (CaF2)

Stilbite zeolite specimen

Stilbite, commonly Ca- or Na-rich zeolite: (Ca,Na)₂–₃Al₃(Al,Si)₂Si₁₃O₃₆·12H₂O

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Weathered basalt or iron-rich volcanic rock

Mafic volcanic rock, likely basalt; exact identification requires testing

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Pink Granite / K-Feldspar

Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Blue Quartz (or Blue Aventurine)

Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)

Green Fluorite

Calcium Fluoride (CaF2)

Weathered greenstone (likely serpentinite or altered basalt)

Serpentinite-group rock, commonly dominated by serpentine minerals (antigorite/lizardite); exact identification requires testing

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony with iron-oxide-rich orbicules; commonly called Ocean Jasper

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Fluorite (often referred to as Rainbow Fluorite)

Fluorite (Calcium Fluoride, CaF2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)