Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Diorite (River Pebble)

Diorite

Granite

Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Granite (composition of Quartz, Feldspar, and Mica)

Granitoid Pebble (Graphic Granite/Pegmatite)

Pegmatitic Granite with Quartz and Orthoclase

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Pegmatite

Granitic Pegmatite

Granite

Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))

Granite

Granite (Mainly Quartz SiO2, Feldspar KAlSi3O8, and Mica KAl2(AlSi3O10)(OH)2)

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Rose Quartz

Rose Quartz (SiO2)

Schist

Mica Schist (primarily Muscovite and Quartz)

Quartz (possibly Citrine or Smoky Quartz variety)

Silicon Dioxide (SiO2)

Diorite

Diorite

Pink Granite (Water-worn Cobble)

Granite (Alkali-feldspar granite)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Michigan Float Copper

Native Copper (Cu)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Granitic Pegmatite with Schorl

Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Granodiorite

Phaneritic Granodiorite

Coarse-grained Granite

Granitoid (KAlSi3O8 + SiO2 + NaAlSi3O8)

Pink Granite (Fragment)

Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)

Crushed Granite Gravel

Granite (Mainly Quartz, Feldspar, and Mica)

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)

Granite

Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)

Diorite

Diorite

Granite

Granite (composed primarily of Quartz SiO2, Orthoclase KAlSi3O8, and Plagioclase NaAlSi3O8 to CaAl2Si2O8)

Granite

Granite (primarily Quartz, Feldspar, and Mica)

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Puddingstone (Jasper Conglomerate)

Jasper Conglomerate (SiO2 matrix with Fe2O3 inclusions)

Red Granite

Potassium-feldspar rich Granite

Rhodonite beads (possibly dyed or treated, or lower quality Rhodonite)

Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3

Granite

Granite (Alkali-feldspar granite)

Crushed Limestone Aggregate

Limestone (Calcium Carbonate, CaCO3)

Granite

Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Ironstone Concretions (Ironstone)

Ferruginous Sandstone or Siltstone (Fe2O3)

Opal

Hydrated amorphous silica (SiO2·nH2O)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Granite (Light-colored quartz/feldspar variety)

Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)