Mixed: Igneous And Sedimentary

River Pebbles and Cobbles

Mixed Siliciclastic Sediments (Quartzite, Chert, and Sandstone clasts)

Banded Iron Formation (BIF) / Iron Ore

Hematite-Magnetite BIF (Fe2O3 / Fe3O4 mixed with SiO2)

Fossiliferous Limestone

Limestone (CaCO3 with Limonite/Goethite staining)

Pyrite-bearing sulfide ore

Pyrite (FeS₂), possibly mixed with chalcopyrite and/or other sulfides

Graphite

Graphite (Carbon, C)

Mixed polished and tumbled mineral specimens, prominently amethyst

Amethyst: purple quartz, SiO₂; accompanying pieces may include jasper, agate, aventurine, tiger’s eye, and other lapidary stones

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Ruby in Zoisite

Anyolite (Ruby in Zoisite)

Chert (with Epidote/Quartz veining)

Cryptocrystalline silica (SiO2) with Epidote/Quartz inclusions

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Mixed gravel and small stones

Unsorted gravel; individual clasts are not identifiable from the image

Mixed collection of small rounded pebbles

Unidentified river- or beach-worn lithic clasts; individual rock types cannot be determined confidently from the image

Mixed rounded river gravel

Polymictic alluvial gravel; likely mixtures of quartzite, granite, basalt, sandstone, and other silicate rocks

River Cobble (Mixed Lithology)

Clastic Sedimentary Rock (Silicified Siltstone or Wacke)

Mixed River Pebbles and Jasper

Siliciclastic sediment and microcrystalline quartz

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Iron-rich concretion (likely limonite/goethite)

Limonite–goethite aggregate; commonly hydrated iron oxides, approximately FeO(OH)·nH₂O

Conglomerate (Greenstone/Pebble Conglomerate)

Polymictic Conglomerate

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained or mixed with feldspar

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Limonite (Iron Ore/Sandstone mixture)

Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix

Tumbled chert or flint

Microcrystalline quartz (SiO₂), commonly chalcedony with possible iron-oxide inclusions

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

Red garnet-bearing metamorphic rock

Almandine garnet (Fe₃Al₂Si₃O₁₂), likely in mica schist or quartz-rich matrix

Mixed mineral and gemstone specimens

Likely amethyst (quartz), malachite, blue calcite or dyed chalcedony, red jasper, and green aventurine/serpentine

Mixed mineral and rock collection, including likely amethyst and assorted tumbled stones

Unidentified mixed specimens; visible purple quartz is likely amethyst (SiO₂)

Mixed mineral and rock specimen collection

Assorted silicates, carbonates, oxides, and sulfides; individual species cannot be reliably identified from this image

Mixed polished/tumbled stones; likely blue calcite, red carnelian, and gray/blue quartz or agate

Probable calcite (CaCO₃), chalcedony/quartz (SiO₂), and iron-colored chalcedony

Agate

Silicon Dioxide (Quartz), SiO2

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Pumice

Vesicular volcanic glass (Amorphous silica mixed with various oxides)

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation

Tumbled blue sodalite beads

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with white albite or calcite veining

Tumbled brown chalcedony or jasper

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing chalcedony/jasper

Possible tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), variably mixed with iron oxides

Mixed small mineral specimens

Likely quartz varieties with possible rose quartz and iron-stained quartz; exact identification is uncertain from the blurred image

Tumbled jasper or chalcedony pebble

Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining

Rounded pebble, likely mixed lithology

Lithology uncertain; possibly a fine-grained metamorphic or volcanic rock with a quartz-rich/pink feldspar vein or inclusion

Mixed beach-stone collection, primarily quartz-rich pebbles and possible fossils

Likely quartz (SiO₂), quartzite, chert, and carbonate rock; exact identification is uncertain from the image