Mineralish (Variety Of Chalcedony)

Polished agate (likely chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Light-colored agate (likely chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image

Polished carnelian agate

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

Polished carnelian (red-orange chalcedony)

Carnelian, a cryptocrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Yellow Jasper

SiO2

Jasper / Chert (river tumbled)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with hematite inclusions

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

Brecciated jasper/chert

Microcrystalline quartz (SiO₂), with iron-oxide and clay inclusions

Agate

Silicon dioxide (Chalcedony), SiO2

Agate

Silicon dioxide (Chalcedony), SiO2

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Carnelian

Silicon dioxide (SiO2) with Iron Oxide impurities

Jasper

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), commonly iron-stained chalcedony; likely carnelian

Tumbled jasper (likely brecciated or mahogany jasper)

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

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled agate or chalcedony

Microcrystalline quartz (SiO₂), likely agate/chalcedony with green inclusions

Polished carnelian agate

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

Tumbled carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled agate/chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂, chiefly chalcedony with possible iron-oxide inclusions

Tumbled carnelian agate

Microcrystalline quartz (chalcedony), SiO₂, iron-oxide colored

Tumbled amber-brown chalcedony (probable carnelian/ag ate)

Microcrystalline quartz, SiO₂; likely iron-stained chalcedony (carnelian)

Yellow agate or yellow chalcedony bead strand

Microcrystalline quartz (SiO₂), chalcedony; possibly iron-stained agate or heat-treated quartz

Polished orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-stained chalcedony

Red jasper-like chalcedony pebble

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper

Green Jasper

Silicon Dioxide (SiO2) with impurities

Tumbled chalcedony (likely pale agate or quartz)

Chalcedony, microcrystalline SiO₂

Agate

SiO2 (Silicon dioxide, chalcedony variety)

Chalcedony with jasper (likely brecciated jasper)

Microcrystalline quartz, SiO₂, with iron-oxide-rich jasper fragments

Tumbled red-brown stone, likely jasper

Jasper, microcrystalline quartz (SiO₂), probably iron-oxide-bearing chert

Polished jasper (likely brecciated or scenic jasper)

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

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite

Ocean Jasper

Silicon dioxide with impurities (SiO2 + impurities)

Tumbled jasper, likely red/brown jasper

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

Polished banded agate

Microcrystalline quartz (chalcedony), SiO₂

Bloodstone

Heliotrope

Tumbled carnelian/chalcedony

Orange chalcedony (microcrystalline quartz), SiO₂; possibly iron-stained agate

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)