Basalt with Large Augite Phenocrysts
Porphyritic Basalt (containing Ca(Mg,Fe,Al)(Al,Si)2O6)
igneous
Category
Mineral Group
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Serpentine-rich serpentinite
Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and chromite
metamorphic
Tumbled white chalcedony (likely milky quartz)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Likely fossilized coral with polished blue calcite or aragonite specimen
Fossil coral, commonly Scleractinia; blue material likely dyed or treated calcite/aragonite
fossil
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Almandine Garnet (weathered)
Almandine (Fe3Al2(SiO4)3)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Polished blue banded stone, likely sodalite or blue apatite
Probable sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue apatite, Ca₅(PO₄)₃(F,Cl,OH)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Tourmalinated Quartz
Quartz (SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) inclusions
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Chalcedony (Agate/Chert)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
mineral
Sunstone
Feldspar group (Oligoclase / Labradorite)
gemstone
Quartz with Spessartine Garnet and Biotite
SiO2 (Quartz) with Mn3Al2(SiO4)3 (Spessartine)
mineral
Greenstone pebble (likely serpentinite)
Serpentinite, composed mainly of serpentine-group minerals
metamorphic
Likely green serpentine or chlorite-rich rock
Serpentine-group minerals, commonly lizardite/magnesite-bearing serpentinite; exact identification requires testing
metamorphic
Weathered vesicular basalt (likely amygdaloidal basalt)
Basalt, chiefly plagioclase + pyroxene ± olivine; cavities may contain secondary zeolites, calcite, or chlorite
igneous
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Mica schist
Mica schist (Muscovite and Biotite group)
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Glaucophane / Blue Schist
Glaucophane (Na2(Mg3Al2)Si8O22(OH)2)
metamorphic
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
metamorphic
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (Microcline / Orthoclase, KAlSi3O8)
mineral
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
metamorphic
Peach Moonstone
Potassium Aluminum Silicate, KAlSi3O8
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
![Stilbite (Stilbite (Hydrated calcium sodium aluminum silicate, NaCa4[Al9Si27O72]·28H2O)) — mineral](https://media.rock.id/stilbite-c1adeb7d-3322-4416-8254-17b15c0e36d3-thumbnail.jpg)
Stilbite
Stilbite (Hydrated calcium sodium aluminum silicate, NaCa4[Al9Si27O72]·28H2O)
mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
mineral
Carbonaceous Chondrite (CV3 type)
Carbonaceous Chondrite (CV3 group)
meteorite
Kimberlite
Kimberlite (Group I or II)
igneous
Quartz with Mica (Granitic / Pegmatitic Quartz)
Silicon Dioxide (SiO2) with Mica group minerals
mineral