Mineral (Variety Of Chalcedony)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite inclusions

Banded Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2)

Polished ocean jasper / orbicular jasper (likely)

Microcrystalline quartz (chalcedony), commonly with iron-oxide and other mineral inclusions

Chalcedony with jasper (likely brecciated jasper)

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

Tumbled jasper, likely red/brown jasper

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

Tumbled red-brown stone, likely jasper

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

Tumbled chalcedony (likely pale agate or quartz)

Chalcedony, microcrystalline SiO₂

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite

Ocean Jasper

Silicon dioxide with impurities (SiO2 + impurities)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), commonly called orbicular jasper or ocean jasper

Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Polished banded agate

Microcrystalline quartz (chalcedony), SiO₂

Jasper (Green Jasper/Heliotrope variety)

Silicon Dioxide (SiO2)

Lake Superior Agate

Silicon Dioxide (Chalcedony variety)

Banded Calcite

CaCO3

Bloodstone

Heliotrope

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished agate or chalcedony pebble

Microcrystalline quartz (SiO₂), likely chalcedony/agate

Polished chrysoprase (likely)

Chalcedony, microcrystalline quartz (SiO₂), colored by nickel-bearing minerals

Orange chalcedony (carnelian-like), possibly iron-stained quartz

Microcrystalline quartz, SiO₂ (chalcedony); orange coloration likely from iron oxides/hydroxides

Tumbled yellow-brown jasper or chalcedony

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

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Tumbled carnelian/chalcedony

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

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Tumbled yellow chalcedony (likely honey agate or yellow quartz)

Microcrystalline quartz, SiO₂; coloration likely from iron oxides or included minerals

Tumbled jasper or chalcedony pebble

Microcrystalline quartz, SiO₂ (likely jasper/chalcedony)

Jasper

SiO2 (Silicon Dioxide)

Ocean Jasper

Orbicular Jasper (variety of Chalcedony)

Yellow Agate

Silicon Dioxide (SiO2)

Polished reddish-brown gemstone, likely carnelian

Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Polished banded agate (likely petrified wood)

Microcrystalline quartz (SiO₂); possibly silicified wood

Red jasper (likely)

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Carnelian Agate

Carnelian (Silicon Dioxide: SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image

Tumbled carnelian

Carnelian, orange-red chalcedony (microcrystalline SiO₂)

Jasper

Silicon dioxide (SiO2)

Polished carnelian agate

Microcrystalline quartz (SiO₂), chalcedony with iron-oxide coloration

Jasper

Silicon dioxide (SiO2)