Mineral Like Biological Tissue

Quartz Geode

SiO2 (Silicon Dioxide)

Malachite-Bearing Copper Ore

Cu2CO3(OH)2 (Malachite) in host rock

Pink Granite

Phaneritic intrusive igneous rock (Felsic)

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Sandstone

Clastic Sedimentary Rock

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)

Quartz Pebble (with Hematite Inclusions)

Silicon Dioxide (SiO2)

Fossil Snail

Gastropoda (fossilized)

Lepidolite (Lithium Mica)

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

Granitic Pegmatite (with Smoky Quartz and Mica)

Granitic Pegmatite (composed of SiO2, KAl2(AlSi3O10)(OH)2, and (K,Na)(AlSi3O8))

Lepidolite

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

Schist

Mica Schist

Greenstone (Metabalt)

Chlorite schist / Epidiorite

Silver Nuggets (Natural or Cast)

Native Silver (Ag)

Gabbro (River Cobble)

Gabbro (mafic intrusive rock)

Rough Rose Quartz

Quartz (Silica - SiO2)

Lepidolite

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

Lepidolite

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

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Plum Blossom Tourmaline

Tourmaline with Lepidolite (Na,Ca)(Li,Mg,Al)3Al6(BO3)3Si6O18(OH)4

Kimberlite with Diamond

Kimberlite (Diamond formula: C)

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Epidote

Epidote - Ca2(Al,Fe)3(SiO4)3(OH)

Fossilized Shark Tooth

Elasmobranchii (Class) fossil

Biotite Granite

Phaneritic Felsic Igneous Rock

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with miscellaneous inclusions

Quartz with Epidote / Chlorite Inclusions

Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)

Iron-stained Quartzite / Agate

Silicon Dioxide with Iron Oxides (SiO2 + Fe2O3·nH2O)

Lepidolite

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

Granite

Granite

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Fire Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite Inclusions (SiO2)

Dalmatian Jasper

Microcrystalline Quartz with Arfvedsonite/Tourmaline inclusions

Lepidolite

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

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Granodiorite

Phaneritic intrusive igneous rock

Greenstone

Metabasalt / Chlorite Schist

Muscovite Mica

Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2

Carved Stone Turtle

Carved Soapstone and Quartz

Ironstone Nodule

Ferruginous Sandstone / Limonite Concretion

Fossil Shark Tooth

Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2