Botryoidal blue-green mineral specimen, likely hemimorphite
Hemimorphite, Zn4Si2O7(OH)2·H2O; possibly associated with calcite or smithsonite
mineral
Category
Mineral (Impactite)
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Iron-stained quartz
Quartz (SiO₂), likely colored by iron-oxide staining
mineral
Foliated metamorphic rock, likely biotite gneiss or schist
Biotite-rich gneiss/schist; chiefly quartz, feldspar, and biotite mica
metamorphic
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
mineral
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Complex silicate rock)
rock
Limonite
FeO(OH)·n(H2O)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Iron-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Goethite) inclusions
mineral
Blue crystal/mineral specimen (possibly blue quartz or dyed stone)
Uncertain from photograph; possible quartz, SiO₂, or a blue copper-bearing mineral
mineral
Chrysocolla-bearing copper mineral specimen (probable turquoise/chrysocolla mix)
Chrysocolla, Cu₂H₂Si₂O₅(OH)₄·nH₂O, with possible turquoise CuAl₆(PO₄)₄(OH)₈·4H₂O and copper oxides
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Amygdaloidal Basalt with Secondary Minerals
Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)
igneous
Gneiss (River Cobble)
Gneiss
metamorphic
Likely weathered quartz-rich rock, possibly granite or gneiss
Granite–gneiss assemblage; chiefly quartz, feldspar, and dark mica/amphibole
igneous
Tumbled jasper (likely picture/brecciated jasper)
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
mineral
Polished jasper carving or slab
Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron-oxide-rich brecciated or orbicular jasper
gemstone
Green Aventurine and Clear Quartz Bracelet
Quartz variety with Fuchsite inclusions (Aventurine) and pure Silicon Dioxide (SiO2)
gemstone
Blue apatite (likely rough/tumbled specimen)
Apatite group, commonly fluorapatite — Ca5(PO4)3F
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Likely weathered quartz-rich rock fragment
Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyromorphite
Pyromorphite (Pb5(PO4)3Cl)
mineral
Fluorite (Fluorescent)
Calcium Fluoride (CaF2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Weathered iron-rich rock, possibly oxidized basalt or laterite
Indeterminate; likely iron-oxide-bearing mafic rock (basaltic composition)
igneous
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Likely dyed or naturally vivid-blue copper mineral specimen
Possibly chrysocolla (hydrated copper silicate); image alone cannot confirm the mineral or whether the color is treated
mineral
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Quartz Geode/Druzy Quartz
Quartz (SiO₂)
Mineral
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral