Mineral

Limonite with Hematite

Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Ironstone Concretions (Ironstone)

Ferruginous Sandstone or Siltstone (Fe2O3)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate)

Wulfenite

Lead Molybdate, PbMoO4

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Geode

Quartz / Chalcedony nodule

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Limonite (Gossan)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Kidney Stone

Nephrolith (typically Calcium Oxalate - CaC2O4)

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

Fossilized Shark Tooth

Carcharodon (Galeocerdo sp. or Lamniform)

Pyrite in Matrix

Iron Sulfide (FeS2)

Amygdaloidal Basalt with Secondary Minerals

Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)

Quartz-rich pegmatite (likely quartz–feldspar–mica specimen)

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica

Dark basaltic rock, possibly scoriaceous basalt

Basalt; predominantly plagioclase and pyroxene, with possible olivine and iron oxides

Quartz vein in host rock

Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Green Fluorite

Calcium Fluoride (CaF2)

Botryoidal calcite (likely calcite concretion)

Calcite, calcium carbonate (CaCO₃)

Milk Quartz (White Quartz)

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Banded Quartz

Silicon Dioxide (SiO2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Banded gneiss

Foliated silicate rock, typically quartz–feldspar–mica gneiss

Foliated metamorphic cobble, likely gneiss

Biotite–quartz–feldspar gneiss (tentative)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Polished banded green stone, likely serpentine or altered volcanic rock

Probable serpentine-rich serpentinite; exact identification requires testing

Milky Quartz with Tourmaline and Iron Oxides

Silicon Dioxide (SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Polished bumblebee jasper (likely Indonesian orbicular jasper)

Jasper: microcrystalline quartz (SiO₂), with iron oxides and volcanic/mineral inclusions

Malachite Coating on Host Rock

Malachite [Cu2CO3(OH)2]

Tumbled quartz-rich stone, possibly blue quartz or granite

Quartz (SiO₂), with probable feldspar and dark accessory minerals

Polished mixed rock, likely orbicular/epidote-bearing granite or basalt

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Snowflake Obsidian

Volcanic Glass (SiO2 rich with Cristobalite inclusions)

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Greenstone / altered basalt pebble

Metamorphosed or hydrothermally altered mafic rock; likely chlorite–actinolite basalt (greenstone)