Metamorphic Or Sedimentary (With Staining)

Weathered iron-rich sandstone or ironstone cobble

Ferruginous sandstone/ironstone, chiefly quartz (SiO₂) cemented or stained by iron oxides and hydroxides

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Weathered quartz-rich metamorphic rock

Probable quartzite or quartz-rich gneiss; predominantly SiO₂ with feldspar and minor mica/iron oxides

Weathered gray metamorphic rock, likely phyllite or slate

Micaceous quartz–phyllosilicate rock; commonly quartz + muscovite/illite ± chlorite

Iron-rich sandstone or ferruginous rock

Ferruginous sandstone, chiefly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃)

Red Sandstone (Iron-rich)

Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)

Weathered sandstone pebble

Quartz-rich sandstone, commonly arkose or lithic sandstone

Quartz with Iron Oxide Staining

Silicon Dioxide (SiO2)

Raw quartz crystal (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz Pebble with Iron staining

Silicon Dioxide (SiO2)

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Quartzite with Iron Inclusions

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Quartzite (with Iron Staining)

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartzite

Metamorphic Quartzite

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz-bearing metamorphic rock, likely quartzite

Quartzite, predominantly SiO₂, with possible feldspar and mica impurities

Quartz Vein in Matrix / Quartzite

Silicon Dioxide (SiO2) with host rock

Weathered quartz-rich metamorphic rock

Likely quartzite or quartz-rich gneiss; predominantly SiO₂ (quartz) with possible feldspar and mica

Weathered quartz-rich rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), with possible iron-oxide staining and minor feldspar or mica

Polished/tumbled orange-brown stone, possibly brecciated jasper or quartzite

Uncertain; likely iron-stained microcrystalline quartz (SiO₂), potentially jasper

Weathered metamorphic boulder, likely schist or gneiss

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface

Orange Quartzita (Calcite-stained Quarzite)

Metamorphic Silicon Dioxide (SiO2) with iron/calcium inclusions

Quartzite Pebble

Metamorphic Quartzite (predominantly SiO2)

Iron-stained garnet-bearing rock, possibly almandine garnet

Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix

Mottled quartz pebble

Quartz (SiO₂), likely iron-oxide-stained milky quartz

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Metamorphosed Quartz-rich Sandstone

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Quartzite (SiO2)

Sandstone Anvil / Nutting Stone

Quartzose Sandstone (Sedimentary Rock)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Quartzite

Metamorphic Quartzite (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Chalcopyrite in Quartz matrix

Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)

Milky Quartz (or Iron-Stained Quartz)

Quartz (Silicon Dioxide, SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz crystal cluster

Quartz (silicon dioxide, SiO₂)