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

Quartz-rich veined rock, likely milky quartz with feldspar or calcite

Quartz (SiO₂), possibly in a quartz–feldspar or quartz–calcite vein

Quartz vein / massive quartz

Quartz (SiO₂), likely milky quartz with iron-oxide and possibly chlorite inclusions

Banded Gneiss with Quartz Vein

Gneiss containing SiO2 (Quartz) intrusion

Blue quartz-bearing rock, possibly chrysocolla-bearing quartzite

Quartz (SiO₂), with probable blue chrysocolla or copper-bearing clay minerals; exact identification requires testing

Unidentified gray rock/mineral specimen

Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen

Quartz Vein in Siltstone

Siltstone with Quartz (SiO2) inclusion

Rounded sedimentary pebble, likely limestone or calcareous sandstone

Indeterminate carbonate-rich clastic rock; possibly micritic limestone (predominantly CaCO₃)

Jasper Conglomerate

Clastic Sedimentary Rock (Conglomeratic Quartzite)

Iron-stained quartz-rich rock, possibly limonite-bearing quartzite

Quartz (SiO₂) with iron oxides/hydroxides, chiefly hematite and goethite

Likely quartz-rich rock fragments

Uncertain; probable quartz with iron-oxide staining, possibly mica-bearing metamorphic rock

Conglomerate

Sedimentary Conglomerate with Basaltic Clast

Puddingstone

Conglomerate

Unidentified weathered stone, likely quartz-rich metamorphic rock

Possibly quartzite or vein quartz; exact identification is uncertain from the image

Wishing Stone (Veined Pebble)

Quartz-veined Metasedimentary Pebble

Iron-stained quartz-rich rock, possibly goethite-bearing quartz

Quartz (SiO₂) with iron oxides/hydroxides, likely goethite or limonite

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Conglomerate

Polymictic Conglomerate

Rounded quartz-rich pebble, likely quartzite or vein quartz

Quartzite (mostly SiO₂), possibly quartz-rich metamorphic rock

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Conglomerate

Conglomeratic Sandstone

Weathered quartz-rich rock, possibly milky quartz

Quartz (SiO₂); the specimen may be massive vein quartz, but its identity is uncertain from the photo

Weathered quartz-rich rock, likely quartzite

Quartzite (predominantly quartz, SiO₂), possibly iron-stained quartz vein material

Rounded white pebble, likely limestone or marble

Calcite-rich carbonate rock; possibly micritic limestone (CaCO₃) or marble

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon dioxide (SiO2)

Weathered quartz-rich rock, possibly quartzite

Quartzite (mostly SiO₂), tentatively identified

Weathered iron-rich concretion or breccia

Goethite/hematite-bearing limonite concretion, possibly ferruginous sandstone

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica

Conglomerate

Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)

Weathered gray sandstone or fine-grained metamorphic rock

Likely quartz-rich sandstone (quartz arenite), possibly weakly metamorphosed metasandstone

Quartz-rich rock, likely milky quartz or quartz vein fragment

Quartz (silicon dioxide, SiO₂), possibly with minor feldspar or calcite

Raw quartz-bearing rock, possibly iron-stained quartz or pegmatitic quartz

Quartz (SiO₂), likely with iron-oxide staining and associated feldspar or mica

Quartz Pebble

Silicon Dioxide (SiO2)

Possible weathered quartz-rich rock or iron-stained mineral fragment

Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions

Quartz-rich metamorphic rock, likely quartzite or vein quartz

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica and feldspar

Tumbled jasper (likely brecciated or red jasper)

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

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Asphalt Concrete

Bituminous conglomerate

Quartz-rich pegmatitic rock, possibly tourmaline-bearing granite

Granitic pegmatite; predominantly quartz (SiO₂), feldspar, and mica, with possible schorl tourmaline

Quartz-rich rock, possibly milky quartz with iron staining

Quartz (SiO₂), likely with limonite/goethite inclusions and minor feldspar or carbonate

Iron-stained quartz or chert fragment

Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining

Milky quartz-rich rock

Quartz (silicon dioxide, SiO₂), likely massive quartz with minor feldspar or host-rock material