Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Tumbled yellow jasper

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

Chalcedony (specifically Agate or Carnelian pebble)

Chalcedony (Microcrystalline Quartz, SiO2)

Fancy Jasper

Silicon Dioxide (SiO₂)

Blue Lace Agate

Chalcedony (SiO2) with trace minerals

Carnelian Agate

Chalcedony (SiO2 with Iron Oxides)

Blue Chalcedony

Silicon Dioxide (SiO2)

Crazy Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Orbicular Jasper

Silicon Dioxide (SiO2), variety of Chalcedony

Quartz (Agate/Chalcedony)

Silicon Dioxide (SiO2)

Banded Agate (specifically Lake Superior Agate style)

Silicon Dioxide (SiO2) - Chalcedony variety

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled blue-gray stone, possibly chalcedony or quartzite

Likely microcrystalline quartz (SiO₂), but the image is insufficient for confident identification

Chalcedony

Silicon Dioxide (SiO2)

Red Jasper (Brecciated or Mottled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Agate

Agate (chalcedony variety of Silicon Dioxide, SiO2)

Yellow jasper (likely iron-stained chalcedony)

Microcrystalline quartz, SiO₂, commonly colored by iron oxides/hydroxides

Tumbled chalcedony (likely pale agate or quartz)

Chalcedony, microcrystalline SiO₂

Bloodstone

Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)

Red Jasper (Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Quartz / Chert

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz

Yellow Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Agate (specifically Botswana or Lake Superior style chalcedony)

Silicon Dioxide (SiO2)

Tree Agate (or Moss Agate), faceted into a crystal tower

Dendritic Agate (Silicon Dioxide, SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Impurities

Chert / Jasper

Microcrystalline Quartz (SiO2)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Tumbled chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (probable chalcedony)

Banded Calcite

CaCO3

Banded Agate (likely Carnelian Agate or Sardonyx)

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

Milky Quartz

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide with iron impurities (Quartz variety, SiO2)

Jasper with Iron Oxides

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Black Onyx

Silicon Dioxide (SiO2) with parallel banding

Jasper (specifically Red or Brecciated Jasper variant)

Jasper (Microcrystalline Quartz - SiO2)

Red Jasper with Quartz

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Chalcedony

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions