Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz vein in weathered host rock

Milky quartz (SiO₂), likely in a feldspathic or carbonate-rich matrix

Iron-stained quartz-rich rock, likely pegmatite or quartz vein fragment

Quartz (SiO₂) with feldspar, mica, and iron-oxide/hydroxide staining; possibly weathered granite pegmatite

Quartzite Pebbles with Quartz Veining

SiO2 (Silicon Dioxide with country rock matrix)

Quartz vein in host rock

Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Likely weathered quartz-bearing rock fragment

Indeterminate granitic or quartz-rich silicate rock; chiefly quartz (SiO₂), possibly feldspar

Quartzite Conglomerate

Conglomerate (SiO2 rich)

Fossil-bearing limestone, possibly a crinoid or shell fragment

Calcite (CaCO₃) limestone containing an indeterminate marine fossil

Quartz Pebble (with Hematite/Feldspar Inclusions)

Silicon Dioxide (SiO2)

Yellowish calcite-rich rock, likely marble or limestone

Calcite (CaCO₃), possibly recrystallized as marble

Purple quartz-bearing pebble, possibly amethyst or lepidolite

Likely quartz (SiO₂) with iron-related purple coloration; exact identification requires testing

Polished blue-gray agate/geode slice (tentative)

Microcrystalline quartz (chalcedony), SiO₂, possibly with druzy quartz

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished/tumbled jasper (likely ocean or brecciated jasper)

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

Puddingstone (Gowganda Tillite/Lorrain Quartzite)

Jasper Conglomerate

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Tumbled brown jasper / iron-rich breccia

Microcrystalline quartz (SiO₂), likely with iron oxides and assorted silicate fragments

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Light-colored quartz-rich stone, possibly milky quartz

Quartz (SiO₂), provisional identification

Quartz vein with specular hematite

Quartz (SiO₂) with hematite (Fe₂O₃), possibly minor goethite or iron oxides

Milky quartz in dark host rock

Quartz (SiO₂), likely as a vein or vein fragment; host rock uncertain

Puddingstone (specifically Gowganda Tillite or St. Joseph Island Puddingstone)

Jasper Conglomerate

Iron-stained quartz-rich rock, possibly quartz vein material

Quartz (SiO₂) with iron-oxide staining; host rock not identifiable from the image

Tumbled picture jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay inclusions

Likely rough quartz fragment

Quartz (SiO₂), possibly iron-stained or included quartz

Sandstone with Quartz Veins

Arenite (primarily SiO2 with Fe2O3 staining)

Quartz geode

Microcrystalline and crystalline quartz, SiO₂, likely with chalcedony and iron-oxide staining

Wishing Stone / Banded Quartz Vein Pebble

Sedimentary pebble with hydrothermal quartz veins (SiO2)

Vein Quartz in Basalt or Chert

Silica-veined dark lithic rock (Quartz veins in microcrystalline matrix)

Geode-like quartz vein in banded chalcedony

Quartz and chalcedony (SiO₂), possibly agate

Quartz / Common Opal

Silicon Dioxide (SiO2)

Mixed mineral and rock specimen collection

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

Quartz-veined ironstone/jasper

Silicified ferruginous rock; predominantly microcrystalline quartz (SiO₂) with iron oxides/hydroxides, likely goethite and hematite

Quartz Vein Rock

Silicon Dioxide (SiO2)

Likely quartz-rich brown rock, possibly iron-stained quartz or quartzite

Quartz (SiO₂), possibly in quartzite or iron-oxide-bearing vein material

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)

Quartz-veined metamorphic rock, likely schist or phyllite

Quartz-bearing mica schist/phyllite; exact identification requires closer examination