Mineral Group

Red jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Mixed polished gemstone bead bracelet, likely ocean jasper, agate, and quartz varieties

Mostly microcrystalline quartz (SiO₂), with possible chalcedony, jasper, and minor feldspar or other inclusions

Tumbled dalmatian jasper (likely)

Microcrystalline quartz/chalcedony with black amphibole or aegirine inclusions; commonly sold as “dalmatian jasper”

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Serpentinite

Serpentinite (group of minerals: Antigorite, Lizardite, Chrysotile)

Polished sodalite pendant

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with minor albite or nepheline

Polished blue banded stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue calcite or dyed agate

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Tumbled jasper, likely ocean or brecciated jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions

Red Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Black Tourmaline (Schorl)

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Fossilized gastropod shell

Calcitic or aragonitic gastropod fossil; likely Mollusca, Gastropoda

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3)

Lepidolite

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

Pale green-gray stone, possibly serpentinite

Serpentinite (rock composed mainly of serpentine-group minerals)

Tumbled yellow jasper (likely iron-stained chalcedony)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions

Dalmatian jasper

Spotted rhyolite (commercially called Dalmatian jasper), chiefly quartz and feldspar with black aegirine/arfvedsonite inclusions

Fossiliferous limestone with ammonite fossil

Ammonite (subclass Ammonoidea) preserved in calcitic limestone, primarily CaCO₃

Sodalite

Na8(Al6Si6O24)Cl2

Tumbled brown-black stone, likely smoky quartz or iron-stained agate

Indeterminate from image; possible quartz (SiO₂), chalcedony, or iron-rich jasper

Polished orbicular jasper (likely kambaba jasper)

Orbicular microcrystalline quartz–feldspar aggregate; commonly sold as Kambaba jasper

Aquamarine (blue beryl) crystals

Beryl, Be₃Al₂Si₆O₁₈; blue variety colored mainly by Fe

Garnet Gneiss or Mica Schist with Garnet

Almandine Garnet-bearing Gneiss

Rounded fossil fragment, possibly fossiliferous limestone

Unidentified carbonate fossil or fossil-bearing limestone; exact fossil cannot be determined from the photograph

Blue apatite specimen

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)

Dalmatian jasper

Quartz-bearing, orbicular microcrystalline silica (commonly sold as “Dalmatian jasper”; often an altered porphyritic igneous rock)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Quartz with Mica

Silicon Dioxide (SiO2) with Mica group inclusions

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Peach Moonstone

Feldspar (KAlSi3O8) with inclusions

Almandine Garnet

Almandine - Fe3Al2(SiO4)3

Heulandite with Stilbite

Heulandite-Ca ((Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O) and Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)

Tumbled Dalmatian jasper

Quartz-rich alkali rhyolite, commonly marketed as Dalmatian jasper; chiefly quartz, feldspar, and dark amphibole/biotite inclusions

Gastropod Fossil

Class Gastropoda (fossilized)