Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Jasper

Silicon dioxide (SiO2)

Tumbled yellow-orange chalcedony (likely carnelian or honey agate)

Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Tumbled chalcedony (likely carnelian or common agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Likely tumbled quartz/chalcedony pebble

Quartz (SiO₂), possibly microcrystalline chalcedony

Tumbled chalcedony (likely mossy/inclusion-rich variety)

Chalcedony, microcrystalline quartz (SiO₂)

Blue Lace Agate

Microcrystalline Quartz (Chalcedony), SiO2

Jasper

Microcrystalline Quartz (SiO2)

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), likely colored by iron oxides

Honey-colored chalcedony (rough agate/chert)

Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide staining

Chalcedony (likely blue agate) knapped into an arrowhead

Microcrystalline quartz, SiO₂ (chalcedony)

Polished agate or chalcedony pebble

Microcrystalline quartz, SiO₂ (chalcedony; exact identification uncertain from the image)

Blue Agate

Chalcedony (SiO2)

Red jasper (likely polished/tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂) colored by iron oxides

Tumbled jasper or chert pebble

Microcrystalline quartz, mainly SiO₂, likely jasper/chert

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely opaque chalcedony/jasper

Polished brecciated jasper (likely dragon-blood or leopard jasper)

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

Tumbled yellow-orange jasper

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

Jasper pebble, likely brecciated jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Polished banded jasper pebble

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

Banded Agate (Polished Slice)

Chalcedony (SiO2) with Quartz

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Blue Agate (Dyed or Treated Chalcedony)

Silicon Dioxide (SiO2), microcrystalline quartz variety

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

Tumbled pale quartz/chalcedony fragment

Quartz (SiO₂), possibly microcrystalline chalcedony

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Yellow Chalcedony

Cryptocrystalline Quartz (SiO2)

Tumbled agate or chalcedony

Microcrystalline quartz, SiO₂

Polished brown-green jasper

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

Polished yellow jasper

Jasper, microcrystalline quartz (SiO₂), commonly containing iron oxides and other silicates

Polished banded agate pendant

Agate, microcrystalline quartz (SiO₂), a chalcedony variety

Tumbled chalcedony (likely milky agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Polished banded agate

Banded chalcedony, microcrystalline quartz (SiO₂)

Agate

SiO2

Jasper (likely brecciated or chalcedony-rich jasper)

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

Tumbled red jasper

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Yellow Jasper

Tectosilicates (SiO2) with Goethite/Iron oxide inclusions

Red jasper (likely polished/chipped fragment)

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

Red jasper pebble (likely)

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

Tumbled dendritic agate (likely)

Chalcedony, microcrystalline SiO₂, with dark manganese/iron-oxide inclusions

Polished jasper pebble

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