Mineral Composite

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Cultured Marble (Synthetic)

Polymer-matrix composite (typically calcium carbonate in polyester resin)

Conglomerate

Polymictic Conglomerate

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Asphalt aggregate (crushed stone in bitumen)

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

Dyed and polished agate cabochon

Microcrystalline quartz (chalcedony), SiO₂; likely colored or composite agate

Concrete / Anthropogenic Conglomerate

Man-made composite material (Portland cement, aggregate, and water)

Graphite-rich schist (probable graphite flake)

Graphite (C) in graphitic schist; possibly graphite-bearing phyllite

Granite

Granite (a plutonic igneous rock)

Pink Zebra Jasper

Microcrystalline Quartz (SiO2)

Asphalt

Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)

Asphalt Chunk

Asphalt concrete

Polished turquoise cabochon jewelry (likely composite or stabilized turquoise)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Ruby in Zoisite

Anyolite (composite of Corundum Al2O3 and Zoisite Ca2Al3(SiO4)(Si2O7)O(OH))

Ruby in Zoisite

Anyolite (composite of Corundum [Al2O3] and Zoisite [Ca2Al3(SiO4)(Si2O7)O(OH)])

Basalt

Basalt (extrusive igneous rock)

Banded malachite cabochon

Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen

Beaded mineral/crystal jewelry (likely turquoise and coral accents)

Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Concrete aggregate surface

Human-made cementitious composite; primarily calcium-silicate-hydrate cement with mixed silicate aggregate

Banded Gneiss

Gneiss (pronounced 'nice')

Geode with Quartz and possibly Jasper/Hematite

Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides

Likely polished leopard-skin jasper or brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen)

Quartz, SiO₂, in an unidentified dark silicate matrix

Polished gemstone tower assortment

Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Hand-Drawn Trading Card (Amateur Artwork)

Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Granite

Granite (Plutonic Igneous Rock)

Banded sandstone pebble

Quartz-rich lithic sandstone; exact provenance and composition require testing

Marble

Recrystallized Calcite (CaCO3)

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Gravel and Sediment Sample

Mixed clastic sediment

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Gravel and Pebbles

Unconsolidated rock fragments / detrital sediment

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sand

Siliciclastic sediment / Quartz sand (SiO2)