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

Conglomerate

Sedimentary Conglomerate

Polished brecciated jasper

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

Quartz-rich pegmatitic rock, possibly altered granite

Quartz–feldspar pegmatite; probable composition of quartz (SiO₂), feldspar, and mica/secondary alteration minerals

Quartz-rich pegmatitic rock, possibly quartzite or milky quartz with iron staining

Predominantly quartz (SiO₂), with probable feldspar and iron-oxide staining; exact classification is uncertain from the photograph

Tumbled quartz-rich pebble, possibly smoky quartz or chert

Quartz (SiO₂), or microcrystalline quartz if chert

Quartz-rich rock fragment (tentative)

Quartz, silicon dioxide (SiO₂), possibly in a weathered host rock

Jasper Conglomerate

Polymictic Conglomerate (Quartz and Jasper clasts in a quartz-rich matrix)

Weathered quartz-rich cobble, possibly milky quartz with iron staining

Quartz (SiO₂), likely with iron-oxide/hydroxide coatings and minor host-rock inclusions

Quartz crystal fragment in weathered host rock

Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix

Veined Sandstone with Calcite Veins

Sedimentary sandstone with hydrothermal/mineral veins

Quartz-rich breccia (likely silicified fault breccia)

Silica-cemented polymictic breccia; primarily quartz (SiO₂) with possible feldspar, mica, and mafic rock fragments

Iron-stained quartz-rich rock, possibly jasper or hydrothermal breccia

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides, likely hematite and goethite; exact identification requires testing

Weathered quartz-bearing rock, possibly porphyritic rhyolite

Likely altered rhyolite or dacite containing quartz and feldspar; exact identification requires testing

Chert Breccia

Microcrystalline Quartz (SiO2) Breccia

Jasper Breccia

Silicon Dioxide (SiO2) with impurities

Polished dark agate or jasper sphere

Microcrystalline quartz (chalcedony), SiO₂; possibly iron-rich jasper

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

Quartz vein in host rock (possibly milky quartz with iron-stained material)

Quartz, SiO₂, with an unidentified host rock and possible iron-oxide staining

Quartzite Conglomerate

Conglomerate (clastic sedimentary rock)

Milky quartz-bearing rock, possibly quartzite or quartz vein

Quartz (SiO₂), likely with feldspar and minor iron-oxide inclusions

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and pale silica-rich fragments

Rounded quartz-rich pebble, possibly milky quartz or quartzite

Quartz (SiO₂), or quartzite if the grainy texture is confirmed

Conglomerate (Red Sandstone variety)

Clastic Sedimentary Rock (Conglomeratic Sandstone)

Weathered quartz-rich rock, possibly granite or pegmatite

Granite/pegmatite; chiefly quartz (SiO₂), feldspar, and minor mica or iron oxides

Iron-rich breccia or weathered ironstone

Hematite/goethite-bearing breccia; exact identification requires testing

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Weathered quartz-rich rock, possibly quartzite or chalcedony

Quartz (SiO₂), likely in a quartzite or silica-rich matrix

Iron-stained brecciated quartz vein rock

Quartz-rich hydrothermal breccia; predominantly SiO₂ with iron oxides/hydroxides (hematite, goethite) and likely minor host-rock minerals

Puddingstone (Conglomerate)

Conglomerate (clastic sedimentary rock)

Brecciated jasper, possibly rainforest jasper or brecciated rhyolite

Brecciated microcrystalline quartz (SiO₂), commonly called jasper; the green portions may contain epidote, chlorite, or iron-bearing silicates, while red-brown areas are typically hematite or other iron oxides

Weathered quartz-rich rock, possibly iron-stained quartz or quartzite

Quartz (SiO₂), likely in a quartzite or quartz-vein matrix with iron oxides

Weathered quartz-bearing rock, possibly granite or pegmatite

Likely quartz–feldspar rock; exact mineral identification is uncertain from the photograph

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled quartz with a healed vein

Quartz (SiO₂), likely iron-stained massive quartz; the white seam may be calcite or quartz

Quartz-veined metamorphic rock, likely greenschist or altered metavolcanic

Chlorite–actinolite–epidote-bearing metavolcanic rock with quartz veins; exact identification requires testing

Weathered quartz-rich pebble

Likely quartz-bearing vein rock; exact identification requires testing

Quartz-rich stone, possibly calcite or quartz

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Weathered quartz-rich rock, possibly iron-stained quartzite or quartz vein fragment

Mostly quartz (SiO₂), with probable iron-oxide staining and minor feldspar or clay minerals

Quartz Vein in Host Rock

Hydrothermal Quartz (SiO2) in Slates/Schists

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony (SiO₂), iron-oxide stained

Quartz Pebble

Silicon Dioxide (SiO2)

Rounded quartz-rich pebble

Likely microcrystalline quartz (chalcedony), possibly weathered quartzite