Unknown

Tiny metallic mineral grain (possibly native silver or a metallic sulfide)

Undetermined from the photograph; native silver (Ag) is one possibility, but identification requires examination or testing

Likely limestone fragment

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

Small blue-green mineral or stone bead

Unidentified opaque blue-green mineral; the image is insufficient for reliable species identification

Polished cabochon, possibly moonstone or opal

Not identifiable from the image; possible feldspar moonstone or opal (hydrated silica, SiO₂·nH₂O)

Small rounded pebble, likely quartz-rich river or beach stone

Unidentified lithic pebble; exact rock type cannot be determined from the image

Likely iron-rich metamorphic rock (possibly hematite-rich ironstone)

Unidentified ferruginous rock; exact mineralogy cannot be determined from the image

Possible fossil tooth or bone fragment

Indeterminate fossilized vertebrate material; species cannot be identified reliably from this image

Unidentified rounded mineral/rock fragment

Indeterminate; likely a weathered quartz-rich stone or iron-stained granite fragment

Unidentified brown mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite

Rounded brown river pebble

Indeterminate lithic fragment; possibly weathered sandstone, mudstone, or basalt

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

Assorted rock and mineral specimens

Multiple unidentified specimens; individual mineral and rock names cannot be determined from this image

Likely dark smoky quartz

Quartz, silicon dioxide (SiO₂); identification is tentative from the photo

Dark gray pebble, possibly slate or fine-grained basalt

Unidentified fine-grained rock; visual identification is insufficient to distinguish slate from basalt

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

Clear crystal-bead bracelet, possibly quartz

Unidentified transparent mineral beads; quartz (SiO₂) is one possibility

Tumbled banded gneiss

Gneiss, a foliated metamorphic rock; exact mineral composition cannot be determined from the image

Likely fossilized bone fragment

Fossil bone; exact taxon and geological age cannot be determined from the image

Iron-stained rock fragment

Likely limonite/goethite-stained rock; the underlying rock cannot be identified confidently from the image

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Serpentine-rich rock (possibly lizardite/serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals such as lizardite, antigorite, or chrysotile

Small fossil shell fragment, likely a foraminiferal or other marine microfossil

Unidentified calcareous fossil; exact taxon cannot be determined from the image

Rounded pebble, likely fine-grained river stone

Unidentified lithic pebble; composition cannot be determined from the image

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Likely quartz-rich rock fragment

Indeterminate; possibly quartz-bearing granite or quartzite

Tumbled Black Stone

Unknown, possibly Obsidian, Onyx, or Tourmaline

Light-colored, weathered rock fragment

Undetermined; possibly weathered granite or granitic rock

Quartz crystals, likely smoky quartz with iron-stained crystals

Quartz (SiO₂), trigonal crystal system

Weathered rock with a tan mineral vein or inclusion

Indeterminate from the photograph; possibly a quartz- or feldspar-rich vein in dark metamorphic host rock

Himalayan Pink Salt

Halite (NaCl) with iron oxide inclusions

Pink halite (rock salt)

Halite (NaCl), likely colored by trace impurities

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)

Weathered, iron-stained rock pebble

Indeterminate; possibly iron-oxide-cemented sandstone or laterite

Rounded gray-green pebble, likely fine-grained volcanic rock

Possibly andesite or basalt; exact identification requires examination

Pyrite-bearing dark slate or phyllite

Likely pyrite (FeS₂) disseminated in fine-grained slate/phyllite; exact host rock cannot be confirmed from the photo

Rounded pebble with a brown mineral or rock inclusion

Unidentified lithic pebble; the pale matrix and brown patch cannot be identified reliably from the image

Polished reddish-brown stone bead, possibly jasper

Likely iron-rich microcrystalline quartz (jasper; SiO₂), but the image is not sufficient for a confident identification

Faceted clear gemstone in a gold-colored ring

Unidentified colorless faceted gem; possibly quartz, glass, or another transparent gem material

Vesicular basalt (lava rock)

Basalt, a fine-grained mafic volcanic rock; chiefly plagioclase, pyroxene, and possibly olivine

Possible fossilized bone fragment

Indeterminate fossil bone; no species can be identified from this image

Rounded gray stone, likely a fine-grained volcanic rock

Possibly andesite or basalt; the image does not show enough detail for a definitive identification

Unidentified small rock fragment

Likely quartz-rich material; exact identification is indeterminate from the image