Mineral Side Rock

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Sandstone Pebble

Arenite (SiO2 based)

Sandstone Pebble

Arenite (SiO2 complex)

Sandstone

Arenite (SiO2 primarily)

Sandstone (Iron-stained)

Arenite (primarily SiO2 with Fe2O3 staining)

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

Veined Sandstone with Calcite Veins

Sedimentary sandstone with hydrothermal/mineral veins

Granitic Pegmatite

Pegmatitic Granite

Quartz in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Shale

Lutaceous sedimentary rock

Quartz Geode

Silicon Dioxide (SiO2)

Rounded pebble, likely fine-grained river stone

Unidentified lithic pebble; composition cannot be determined from the image

Conglomeratic gravel / polymictic breccia

Polymictic rudite, likely anthropogenic or beach/stream gravel; composition varies

Quartz-rich rock fragment

Likely quartz vein material, predominantly quartz (SiO₂); identification is tentative from the image

Sandstone

Clastic Sedimentary Rock

Sandstone

Arenite (SiO2 primarily)

Shale

Fissile Siliciclastic Sedimentary Rock

Sandstone

Sedimentary Rock (Quartz arenite)

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), with iron-oxide staining

Sandstone

Clastic Sedimentary Rock

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Red Sandstone (with possible iron oxide staining)

Sandstone (primarily Quartz with Hematite/Goethite cement)

Glacial erratic boulder, probably granite or granitic gneiss

Granite–gneiss; mainly quartz, feldspar, and mica

Dark, coarse-grained rock (possibly diorite or amphibolite)

Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

N/A - Non-Geological Item

Shale

Shale (clastic sedimentary rock)

Agate (specifically a Yellow/Honey Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Druzy (on Matrix)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based typically)

Small dark rock fragment (unidentified)

Undetermined; the image does not show enough detail for reliable identification.

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2) with various iron-oxide inclusions

Likely weathered iron-rich breccia or jasper

Silicified iron-oxide breccia; exact identification requires testing

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Weathered granite (likely)

Granite, a quartz–feldspar–mica intrusive igneous rock

Granite

Felsic intrusive igneous rock

Shale

Shale (Fine-grained clastic sedimentary rock)

Rock specimen shown in a classroom identification activity

Undetermined; the pictured specimen may be a fine-grained, pinkish rock, but the image does not provide enough detail for a reliable identification

Vesicular Basalt (Scoria)

Basalt with vesicular texture