Mixed (Sedimentary, Igneous, And Metamorphic)

Iron-rich concretion or weathered limonite/goethite nodule

Limonite (hydrous iron oxides), commonly dominated by goethite (FeO(OH))

Unakite

Unakite (metamorphosed granite)

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

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Weathered quartz-bearing rock fragment

Indeterminate; likely quartz-rich granite, gneiss, or pegmatitic rock

Breccia

Breccia (Clastic sedimentary rock)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Gravel or Pebble

Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)

Copper Ore

Cupriferous Rock / Mixed Mineral Matrix

Unakite

Unakite (altered granite)

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Jasper and Quartz Breccia

Silica breccia (SiO2)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Purple Lepidolite with Quartz

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

Tumbled jasper (likely yellow/brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and clay inclusions

Epidosite with Quartz (Unakite-variant or Jasper)

Epidotized Metasomatite

Serpentine (likely polished/tumbled)

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile Mg₃Si₂O₅(OH)₄

Fossiliferous limestone with silicified fossil material

Bioclastic limestone; likely marine mollusk/coral fragments, locally replaced by chalcedony or calcite

Weathered granitic rock fragment

Likely granite or granodiorite, composed mainly of quartz, feldspar, and mica

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Pink Granite

Phaneritic Felsic Igneous Rock

Polished blue-gray mineral specimen, likely galena-bearing ore

Galena (PbS), possibly mixed with quartz/calcite and secondary copper minerals

Polished/tumbled rhodonite-rich stone

Rhodonite (MnSiO₃), likely mixed with quartz and manganese oxides

Magnetite-rich black sand

Magnetite (Fe₃O₄), likely mixed with other heavy minerals

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Black Tourmaline (Schorl)

NaFe3Al6(BO3)3Si6O18(OH)4

K-feldspar Granite / Red Granite Fragment

Alkali feldspar granite (Plutonic igneous rock)

Unakite

Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz

Diorite

Diorite (plutonic igneous rock)

Yellow Sapphire (Pukhraj)

Corundum (Al2O3)

Mixed rounded beach gravel

Polymictic alluvial or beach clasts, likely including quartzite, limestone, granite, and other silicate rocks

Unakite

Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)

Metallic sulfide mineral specimen, likely pyrite

Pyrite (iron disulfide, FeS₂), possibly mixed with marcasite or chalcopyrite

Jasper and Greenstone Pebble

Siliceous rock / Metamorphic pebble

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Granite Pebble

Intrusive Igneous Rock (Granite)

Greenstone / Diorite

Intermediate plutonic igneous rock

Granite / Feldspar gravel

Granite (felsic intrusive igneous rock)

Weathered brown sandstone or quartzite cobble

Indeterminate sandstone; possibly quartz-rich quartzite

Gravelly, weathered sediment (likely glacial till)

Unconsolidated diamicton; mixed lithologies, commonly including quartz, feldspar, and weathered silicate rock fragments

Granite (Pink/Potassium Feldspar rich)

Granite (K-feldspar rich intrusive igneous rock)

Conglomerate

Conglomerate