Metamorphic Or Sedimentary (With Staining)

Quartz Pebble

Silicon Dioxide (SiO2)

Iron-stained quartz vein rock

Quartz-rich vein material with iron oxides/hydroxides (quartz, SiO₂, stained by hematite/goethite); likely hosted in a metamorphic rock

Quartz Crystal (Rough)

Silicon Dioxide (SiO2)

Ferruginous Quartz / Iron-Stained Quartz

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

Quartzite Pebble

Quartzite (mostly SiO2)

Quartz Pebble (Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Quartzite with Iron Inclusions

Metamorphosed Sandstone (SiO2 dominated)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

Red Quartzite (Ferruginous Quartz)

Quartzite (SiO2 with Fe2O3 inclusions)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Weathered quartz-rich rock, likely granite or gneiss

Indeterminate granitic rock; mainly quartz, feldspar, and mica

Quartz crystal

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

Rounded river pebble, likely quartz-rich sandstone or quartzite

Indeterminate; probable quartz (SiO₂) with feldspar, iron-oxide staining, and minor lithic grains

Quartzite

Quartzite (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite

Yellow Quartzite (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide staining

Quartzite with Iron Staining

Metamorphic Quartzite (SiO2)

Quartz with Mica

Silicon Dioxide (Quartz, SiO2) with Muscovite/Biotite Mica

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained or included in a mixed rock; exact identification is uncertain from the image

Quartz Pebble

Silicon Dioxide (SiO2)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Chert (River Pebble)

Cryptocrystalline Quartz (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Quartzite with Quartz Vein

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Quartz-rich breccia or quartzite with iron-oxide veining

Microcrystalline to granular SiO₂ (quartz), with hematite/goethite and minor feldspar or mica

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Weathered coarse-grained igneous rock, likely diorite or gabbro

Diorite–gabbro compositional range; chiefly plagioclase feldspar, amphibole/pyroxene, and minor biotite or quartz

Quartz-rich metamorphic rock (probable quartzite)

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica and iron-oxide impurities

Milky quartz (iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Weathered sandstone block

Quartz-rich sandstone; exact composition cannot be confirmed from the image

Quartz-rich rock, likely quartzite or quartz vein fragment

Quartz (SiO₂), possibly with iron-oxide staining and minor feldspar/mica

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Weathered quartz-bearing rock, possibly iron-stained quartzite

Quartzite (mostly SiO₂), tentatively identified

Likely garnet-bearing rock (possibly almandine garnet in dark matrix)

Garnet, probably almandine (Fe₃Al₂(SiO₄)₃); host rock is not identifiable from this image

Likely weathered sandstone or iron-stained sedimentary rock

Quartz-rich sandstone; exact identification is limited by the blurred photograph

Weathered brown mineralized rock

Likely iron-stained quartzite or quartz-rich metamorphic rock; exact identification requires testing

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Iron-stained quartzite or chert

Quartzite, predominantly SiO₂, with iron-oxide staining

Tumbled golden-brown stone, likely sandstone or iron-stained quartzite

Indeterminate from image; probable quartz-rich sandstone (SiO₂) or quartzite