Sedimentary (Jasper), Mineral (Aquamarine)

Red jasper (likely tumbled jasper/chert)

Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Orbicular jasper (picture jasper)

Silicified volcanic or sedimentary rock; chiefly microcrystalline quartz (SiO₂) with iron-oxide pigments

Yellow Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Raw Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Jasper

Microcrystalline Quartz (SiO2)

Jasper

Silicon dioxide (SiO2)

Brown Jasper

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions

Tumbled brown jasper (likely iron-rich chalcedony)

Jasper, opaque microcrystalline quartz (SiO₂), commonly colored by iron oxides

Bumblebee Jasper

Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)

Jasper-Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Dalmatian Jasper

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Tumbled jasper (likely brecciated or leopard jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Jasper (Picture Jasper)

Quartz (Silicon Dioxide) - SiO2 with impurities

Yellow Jasper

Silicon Dioxide (SiO2)

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Jasper

Microcrystalline Quartz (SiO2)

Jasper

Silicon dioxide (Microcrystalline quartz, SiO2 with iron oxide impurities)

Red jasper (likely tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides

Polished brown jasper pebble

Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), commonly containing iron oxides and other impurities

Polished dendritic jasper or agate slab

Microcrystalline quartz (SiO₂), likely jasper with chalcedony and iron/manganese dendrites

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

Polished kambaba jasper

Orbicular stromatolitic jasper; microcrystalline quartz (SiO₂) with chlorite/amphibole-rich inclusions

Jasper, Agate, Quartz Mix (Polished Beads)

SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.

Jasper

Chalcedony (SiO2)

Polished ocean jasper (orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-rich and volcanic inclusions

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

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

Yellow Jasper

Chalcedony (SiO2) with iron oxide inclusions

Tumbled yellow jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Jasper

Silicon Dioxide (SiO2) with impurities

Jasper

Silicon Dioxide (SiO2)