Sedimentary And Metamorphic

Mixed rock and mineral collection

Assorted geological specimens; individual species cannot be reliably identified from the image

Jasper (Green)

Silicon dioxide (SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Likely iron-stained quartz or quartzite fragment

Quartz (SiO₂), possibly quartzite; exact identification is uncertain from the image

Likely quartz-rich rock fragment

Unidentified pale, granular silicate specimen; possibly quartz or quartzite

Pyrite

Iron Disulfide (FeS2)

Amethyst and Calcite collection

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Pyrite (FeS2)

Quartz

Silicon Dioxide (SiO2)

Small brown mineral fragment

Unidentified; the image lacks enough detail for a reliable species-level identification

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Mossy Rock

Mixed lithology rock with Bryophyta (moss)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Mixed rock and mineral specimen collection

Varied silicate, carbonate, and oxide minerals; individual identification is not possible from this group photograph

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Pink-and-white banded quartzite or jasper

Quartzite, primarily microcrystalline SiO₂, possibly iron-stained quartz/chalcedony

Mixed collection of natural stones

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

Milky Quartz

Silicon Dioxide (SiO2)

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin

Carnelian

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

SiO2 (Silicon Dioxide)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Jasper

Jasper (Silica-rich Microcrystalline Quartz, SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Chalcedony (Tumbled Pebble)

Silicon Dioxide (SiO2)

Yellow Aventurine

Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)

Pale green translucent mineral fragment, likely calcite

Calcite (CaCO₃), tentatively; possibly green fluorite or prehnite

Mixed rock and mineral specimen collection

Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks

White Agate / Chalcedony

Silicon Dioxide (SiO2)

Unidentified gray-brown stone

Likely fine-grained quartz–feldspar rock; exact identification is not possible from this close, blurred image

Unidentifiable Rock Fragment

Tiger's Eye

Silicon dioxide (SiO2) - Pseudomorph after crocidolite

Milky Quartz

Silicon Dioxide (SiO2)

Likely quartz fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Likely pyrite-bearing rock

Pyrite (FeS₂), possibly disseminated in a host rock

Pyrite-bearing rock (likely pyrite-rich ore)

Pyrite, FeS₂, in a fine-grained host rock

Mixed mineral and rock collection

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