Man Made Material (Simulated Mineral)

Sandstone (Tumbled / Rounded)

Sedimentary Rock (Quartz arenite)

Quartz

Silicon Dioxide (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Apatite

Fluorapatite (Ca5(PO4)3F)

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Microcline Feldspar

KAlSi3O8

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble with Drusy/Crystalline Pocket

Silicon Dioxide (SiO2)

Milky Quartz with Matrix

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Silver (Morgan Dollar)

Native Silver (Ag) - 90% Silver, 10% Copper alloy

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Iron-stained weathered stone (tentative)

Undetermined; possibly weathered iron-rich basalt or concretion

Yellow Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Malachite in Matrix

Copper Carbonate Hydroxide - Cu2CO3(OH)2

Copper Ore with Malachite and Chalcocite

Copper-bearing Mineral Assemblage (Cu2CO3(OH)2 + Cu2S)

Amazonite

Amazonite (KAlSi3O8, a triclinic variety of Potassium Feldspar)

Biotite (Black Mica)

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

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

Tumbled gray-green metamorphic rock, likely serpentinite or chlorite schist

Serpentinite/chlorite-rich ultramafic metamorphic rock; commonly dominated by antigorite, lizardite, or chlorite with minor magnetite and talc

Granite

Granite (Plutonic Igneous Rock)

Petrified Wood

Silicified Wood (primarily SiO2)

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

Green copper-mineral specimen, likely chrysocolla or copper-bearing serpentine

Tentatively chrysocolla (hydrated copper phyllosilicate, approximately (Cu,Al)2H2Si2O5(OH)4·nH2O); exact identification requires testing

Rounded quartz-rich beach pebble

Likely milky quartz or quartzite (SiO₂)

Likely quartz-rich river pebble

Milky quartz or quartz-bearing granitic/gneissic fragment (SiO₂-dominant)

Quartz-rich breccia or altered granite fragment

Polymineralic quartz–feldspar rock, likely hydrothermally altered granite/pegmatite

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Sandstone with Dendritic Inclusions

Quartzose Sandstone

Polished green aventurine (probable)

Quartz, SiO₂, with green fuchsite or chlorite inclusions

Iron-rich weathered stone, possibly hematite-rich ironstone

Hematite/goethite-bearing ironstone; predominantly Fe₂O₃ and FeO(OH)

Chert Nodule

Chert (Microcrystalline Silicon Dioxide, SiO2)

Granite

Granite (Plutonic Igneous Rock)

Blue-dyed howlite beads (likely)

Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise

Limonite/goethite-rich ironstone (probable)

Limonite, chiefly hydrated iron oxides; commonly goethite, α-FeO(OH), with possible quartz or host-rock inclusions

Rounded river cobble, likely basaltic volcanic rock

Fine-grained mafic igneous rock; likely basalt or andesite