Sedimentary Rock (Technically A Variety Of Chalcedony)

Banded Agate (likely Carnelian Agate or Sardonyx)

Agate is a common name for a microcrystalline variety of Quartz (SiO₂), specifically a form of Chalcedony.

Tumbled yellow-orange jasper

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

Tumbled yellow jasper

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

Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Chalcedony (Agate/Carnelian)

Silicon Dioxide (SiO2)

Jasper with Quartz (Agate/Jasper mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

African Turquoise

African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)

Chalcedony (Botryoidal/Agate nodule)

Microcrystalline Quartz (SiO2)

Polished jasper carving or slab

Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron-oxide-rich brecciated or orbicular jasper

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), with iron-oxide staining

Banded Calcite

CaCO3

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Dalmatian Stone

Dalmatian Stone (formerly called Dalmatian Jasper)

Red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Jasper and Agate (Polished Pebble)

Chalcedony (SiO2 with impurities)

Dendritic Agate (River Pebble)

Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions

Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite/Riebeckite

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Tumbled gray-blue agate/chalcedony

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Orange-red jasper pebble

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

Tumbled brown jasper

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

Polished brecciated jasper pendant

Jasper, an opaque microcrystalline variety of chalcedony (mostly SiO₂), with iron-oxide staining and likely brecciation

Polished jasper

Microcrystalline quartz (SiO₂), likely brecciated or orbicular jasper

Polished red jasper

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

Chert / Flint

Cryptocrystalline quartz (SiO2)

Tumbled brown jasper

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

Chalcedony (Common Opal variant or Quartz)

Silicon Dioxide (SiO2)

Banded agate tower (likely onyx/chalcedony)

Microcrystalline quartz, SiO₂; commonly called banded agate or black-and-white onyx

Chalcedony (Botryoidal Agate vein)

Chalcedony (Microcrystalline Quartz) - SiO2

Jasper

Jasper (Silicon Dioxide, SiO2 plus various impurities)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Polished brown jasper (likely picture jasper)

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

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Zebra Jasper

Silicon Dioxide (SiO2) with impurities

Dalmatian Jasper

Peralkaline rhyolite with arfvedsonite inclusions

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Polished banded jasper pebble

Jasper, a microcrystalline quartz variety (SiO₂), with iron-oxide and clay/mineral impurities

Polished brecciated jasper

Jasper (microcrystalline quartz, SiO₂), likely brecciated and iron-stained

Tumbled yellow-brown jasper

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