Mineral, Part Of A Rock

Laterite

Laterite (no specific mineral formula as it's a rock type)

Nephrite Jade

Nephrite

Quartz Pebble

Silicon Dioxide (SiO2)

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Diamond

Diamond (pure carbon; C)

Chalcedony Geode Part (Agate/Quartz)

Silicon Dioxide (SiO2)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Rutilated Quartz (beads)

SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)

Unknown Rock Fragment

Unknown

Pebble

Clast (specifically a granule or small pebble)

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Green Tourmaline

Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4

Pink granite pebble

Granite, a coarse-grained felsic intrusive igneous rock

Banded Iron Formation (Fragment)

Banded Iron Formation (BIF)

Copper Ore / Altered Granodiorite

Cupriferous rock with silicate gangue

Sandstone

Clastic sedimentary rock (primarily SiO2)

Likely banded gneiss

Quartz–feldspar–mica gneiss (tentative visual identification)

Basalt with Quartz Vein

Mafic volcanic rock with hydrothermal SiO2 filling

Red Sandstone

Arenite (primarily quartz with iron oxide cement)

Weathered geode or vug-bearing rock

Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image

Granite (weathered cobble)

Granite; chiefly quartz, feldspar, and mica/amphibole

Weathered porphyritic basalt

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

Granite pebble

Granite, chiefly quartz, feldspar, and mica

Likely granite pebble

Granite, a quartz–feldspar–mica intrusive igneous rock

Likely iron-rich laterite or limonite/goethite nodule

Hydrated iron oxides, chiefly limonite (FeO(OH)·nH₂O) and/or goethite (FeO(OH))

Rock Specimen

Unclassified rock specimen

Schist (likely Mica Schist)

Mica Schist

Crushed stone aggregate

Mixed lithic aggregate; individual fragments cannot be identified from the image

Xenolith in Basalt

Mafic Igneous Rock with Felsic Inclusion

Basalt with Xenolith

Extrusive Igneous Rock containing Mantle Xenolith

Small red-brown mineral or rock fragment

Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide

Rough garnet-bearing rock, likely almandine garnet in matrix

Almandine garnet, Fe₃Al₂(SiO₄)₃; exact host rock cannot be determined from the image

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Pumice

Pumice (volcanic rock)

Gneiss (rounded cobble)

Quartz–feldspar–mica gneiss; exact mineral proportions cannot be determined from the image

Rounded granitic gneiss pebble

Quartz–feldspar–biotite gneiss (tentative; exact identification requires closer inspection)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Red Sandstone

Clastic Sandstone (typically Quartz-rich with Iron Oxide)

Possibly garnet-bearing rock fragment

Unidentified reddish-brown mineral or rock; the image is insufficient for a reliable species identification.

Serpentinite

Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)

Coarse-grained gray metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss (probable)