Mineral (Chalcedony Variety)

Weathered jasper/chert nodule

Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert

Agate (within host rock)

Agate (Quartz variety SiO2)

Banded Agate

Chalcedony (SiO2) with impurities

Polished banded agate, likely moss or dendritic agate

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese inclusions

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Brecciated jasper (likely ocean jasper or red jasper)

Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement

Polished blue banded agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with trace iron and other coloring elements

Agate (Plume/Moss variety)

Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions

Carnelian (orange-red chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Chalcedony

Cryptocrystalline Quartz (SiO2)

Agate

SiO2

Tumbled carnelian (likely)

Carnelian, orange-red variety of cryptocrystalline silica (SiO₂), chalcedony

Carnelian Ring

SiO2 (Variety of Chalcedony)

Blue Lace Agate

Chalcedony (SiO2) with trace minerals

Agate

Silicon dioxide (SiO2)

Tumbled Agate

Silicon Dioxide (SiO2)

Tumbled carnelian/chalcedony pebbles

Chalcedony, microcrystalline quartz (SiO₂), likely iron-colored carnelian

Tumbled green jasper (probable)

Jasper, opaque microcrystalline quartz (SiO₂), colored by iron and other impurities

Tumbled brown jasper (likely iron-rich chalcedony)

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

Carnelian/chalcedony rough

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

Tumbled brown jasper

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

Tumbled jasper or iron-rich chert

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

Red jasper fragment

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

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Ferric Oxide inclusions

Banded Black Agate

Silicon Dioxide (SiO2)

Carnelian

Carnelian (Silicon Dioxide - SiO2 with iron oxide impurities)

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Honey Calcite (Orange Onyx)

Calcium Carbonate (CaCO3)

Tumbled amber-colored chalcedony or jasper

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

Ocean Jasper

SiO2 (Silicon Dioxide) - Chalcedony variety

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper (specifically Yellow or Bumblebee-like Jasper)

Silicon Dioxide (SiO2) with impurities

Polished red jasper pebble

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

Polished brown jasper (likely ocean or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Carnelian (orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety

Tumbled carnelian (likely chalcedony)

Carnelian, orange-red cryptocrystalline quartz (SiO₂), a variety of chalcedony

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Orca Agate (Chalcedony)

Silicon Dioxide (SiO2) with inclusions

Polished orbicular jasper (probable ocean jasper)

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