Igneous, Sedimentary, And Metamorphic Mix

Rounded gray stone, likely slate or fine-grained sandstone

Probable slate (low-grade metamorphosed shale) or lithic sandstone; exact identification requires testing

Bauxite

Aluminum ore / Hydrated aluminum oxides

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

White quartz geode nodule

Quartz (SiO₂), likely a quartz-lined geode or vug in a host rock

Granite (with mafic xenolith)

Phaneritic Felsic Plutonic Rock

Polished brecciated jasper pendant

Silica-rich jasper (microcrystalline quartz, SiO₂), brecciated and cemented by silica or iron-rich material

Diorite

Diorite

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich vein

Chalcedony (Agate/Jasper mix)

Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Agate mix)

Microcrystalline Quartz (SiO2)

Polished ruby-in-zoisite sphere (anyolite)

Ruby-bearing zoisite, commonly called anyolite; zoisite Ca₂Al₃(SiO₄)₃(OH) with corundum ruby Al₂O₃

Asphalt Conglomerate

Artificial Bituminous Conglomerate

Chakra Crystal Bracelet

Mixed Mineral Assortment

Yellow-orange quartz/chalcedony pebble (possibly citrine-bearing)

Quartz, SiO₂; likely microcrystalline chalcedony with iron staining

Diorite

Diorite

Unakite (or Polished Jasper Pebble)

Altered Granite (Epidote-Orthoclase Rock)

Diorite

Intermediate plutonic igneous rock

Pumice

Pumice (a highly vesicular extrusive igneous rock, primarily amorphous silica)

Diorite

Phaneritic intermediate plutonic rock

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Crushed Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Rhyolite pebble (likely flow-banded rhyolite)

Rhyolite; fine-grained, silica-rich volcanic rock, typically quartz and alkali feldspar

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

Diorite with Quartz Vein

Intermediate plutonic igneous rock (Diorite / Metagabbro with SiO2 quartz alteration)

Shiva Lingam

Cryptocrystalline Quartz (Jasper/Chalcedony) with Iron Oxide inclusions

Quartz

Silicon Dioxide (SiO2)

Chert (and Quartzite)

Microcrystalline silica (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Polished Mookaite Jasper

SiO2 (Silicon Dioxide with impurities)

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Granite (likely biotite-bearing granite)

Coarse-grained felsic intrusive rock, mainly quartz, feldspar, and dark biotite or amphibole

Chert (Jasper/Chalcedony mix)

Microcrystalline Quartz (SiO2)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Schist with Biotite and Quartz

Biotite-Quartz Schist (Fe,Mg,Al silicate mix)

Rounded greenstone (likely serpentinite or chlorite-rich metamorphic rock)

Serpentinite/chlorite-actinolite schist; composition commonly dominated by serpentine-group minerals, chlorite, actinolite, magnetite, and minor iron oxides

Mixed collection of natural stones

Several unidentified lithologies, likely including basalt, granite, quartzite, sandstone, and weathered metamorphic rocks

Mahogany Obsidian

Volcanic Glass (predominantly SiO2 with Hematite/Magnetite inclusions)

Chert (Common Opal/Jasper mix)

Silicon Dioxide (SiO2) with impurities

Chert (Common Opal/Quartz mix)

Microcrystalline Silicon Dioxide (SiO2)

Diorite

Plutonic Igneous Rock (Intermediate Composition)

Asphalt aggregate (crushed stone in bitumen)

Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture