Mineralish (Variety Of Chalcedony)

Chalcedony (rough)

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

Tumbled orange chalcedony or carnelian

Cryptocrystalline quartz, SiO₂; likely carnelian variety

Chalcedony Nodule in Matrix

Silicon Dioxide (SiO2)

Polished yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂

Likely rough carnelian (orange-brown chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); variety possibly carnelian

Tumbled jasper (likely)

Microcrystalline quartz, SiO₂; likely jasper, a variety of chalcedony

Carnelian (Banded Agate)

Carnelian Chalcedony (SiO2)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Chalcedony (likely agate/chert fragment)

Microcrystalline quartz, SiO₂

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Tumbled orange-and-white chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly iron-colored carnelian

Tumbled amber-colored chalcedony and quartz

Chalcedony (microcrystalline SiO₂), quartz (SiO₂), possibly carnelian or citrine; one piece may be druzy chalcedony

Tumbled pink chalcedony (likely pink agate/jasper)

Microcrystalline quartz, SiO₂, with iron-oxide coloring

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Tumbled chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly Fe-bearing carnelian

Chalcedony (Variety: Agate)

Silicon Dioxide (SiO2)

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Jasper (specifically Red Jasper or Iron-stained Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Tumbled carnelian agate

Cryptocrystalline quartz (SiO₂), chalcedony variety colored by iron oxides

Jasper

Silicon dioxide (SiO2) with iron impurities

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Blue Chalcedony

Silicon Dioxide (SiO2)

Agate (Chalcedony)

Cryptocrystalline Quartz (SiO2)

Polished chalcedony with iron-oxide cap (probable carnelian/agate)

Microcrystalline quartz, SiO₂, with hematite/goethite inclusions

Tumbled jasper (likely mookaite or brown/orange jasper)

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

Blue Lace Agate (Beads)

Silicon dioxide (SiO2) - Variety of Chalcedony

Agate

Silicon Dioxide (Chalcedony), SiO2

Agate

Chalcedony (Silicon Dioxide, SiO2)

Tumbled pale quartz/chalcedony fragment

Quartz (SiO₂), possibly microcrystalline chalcedony

Banded Agate (Polished Slice)

Chalcedony (SiO2) with Quartz

Polished brecciated jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Agate and Chalcedony Beads

Cryptocrystalline Quartz (SiO2)

Red jasper (likely iron-stained chert)

Microcrystalline quartz, SiO₂, colored chiefly by iron oxides; identification is provisional from the photo

Polished red jasper

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

Tumbled orange-brown jasper

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

Banded chert or jasper (likely iron-rich jasper)

Microcrystalline quartz (SiO₂), commonly with hematite/goethite and clay impurities

Polished carnelian agate point

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

Brown chalcedony (likely jasper or chert)

Microcrystalline quartz, SiO₂; opaque iron-oxide-rich variety

Tumbled brown jasper (probable)

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

Polished agate or jasper slice

Microcrystalline quartz (chalcedony), SiO₂, possibly iron-oxide-bearing jasper