Synthetic (Not A Rock Or Mineral)

Quartz-veined Limestone

Sedimentary limestone with hydrothermal quartz/calcite veins (CaCO3 / SiO2)

Milky quartz vein rock

Quartz (SiO₂), likely in a quartz-rich host rock with minor iron-stained minerals

Chalcedony Geode

Silicon Dioxide (SiO2)

Quartz Vein in Basalt or Mafic Rock

Silicon Dioxide (SiO2) vein in volcanic/mafic matrix

Sandstone (Wonderstone)

Clastic Sedimentary Rock (primarily SiO2)

Blue glassy mineral fragment, possibly dyed/cobalt-colored calcite or aragonite

Uncertain from image; vivid blue coloration may indicate treated calcite (CaCO₃), aragonite (CaCO₃), or synthetic glass

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Note: No specimen visible

Quartz Geode

Silicon Dioxide (SiO2)

Weathered granite or granitic gneiss

Granite; primarily quartz, feldspar, and mica

Banded Gneiss Pebble

Gneiss (Metamorphic Rock)

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Granodiorite (Weathered)

Granodiorite

Unidentified pale mineral or rock specimen

Indeterminate; image quality prevents reliable mineral identification

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Sandstone (with Rock Art)

Sandstone (Clastic Sedimentary Rock)

Iron-rich breccia or weathered ironstone

Goethite–hematite-bearing limonite, possibly with quartz and altered rock fragments

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Orbicular granite (likely rapakivi-type granite)

Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende

Sandstone with Lichen and Iron Oxide Staining

Quartz Arenite / Sandstone

Granite

Granite, a felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz Vein in Basalt or Slate

Hydrothermal quartz vein traversing mafic host rock

Likely serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄

Gneiss

Foliated Metamorphic Rock (Gneiss)

Greenstone, likely altered basalt

Metabasalt (chlorite–actinolite–epidote assemblage), likely greenschist-facies greenstone

Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)

Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 oxides)

Smooth gray pebbles

Unidentified rounded rock fragments; composition cannot be determined from the image

Sandstone with Quartz Vein

Arenite with Crystalline Silica (SiO2)

Granite

Phaneritic plutonic rock (SiO2 rich)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Quartz in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Veined Sandstone with Calcite Veins

Sedimentary sandstone with hydrothermal/mineral veins

Weathered porphyritic basalt

Basalt, likely plagioclase-phyric basalt; primarily a fine-grained aggregate of plagioclase feldspar, clinopyroxene, and possibly olivine or iron-titanium oxides

Glacial erratic boulder, probably granite or granitic gneiss

Granite–gneiss; mainly quartz, feldspar, and mica

Sandstone

Clastic Sedimentary Rock

Granite

Felsic intrusive igneous rock

Sandstone or possibly a conglomerate

Arenite (if sandstone)

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite