Chalcedony

Chalcedony is cryptocrystaline quartz--meaning it is the same material as quartz (silicon dioxide, SiO2) but has crystallized in a random instead of regular lattice. This makes chalcedony a tougher material than regular quartz that is more resistant to chipping.

Opal is silicon dioxide that has not fully crystalized and contains water. And in agate, the material between the bands that holds the stone together is chalcedony. This is why opal, chalcedony and agate are seen together in some of the gemstone beads below.

Strands of chalcedony beads from our gemstone bead gallery.

Opal chalcedony edge faceted bead strand Catalog 1597 15.5 in. 10mm 350 ct. $15	Chalcedony long oval beads Catalog 1790 16 in. 24 x 8mm 150 carats $14	Chalcedony faceted barrel beads Catalog 1792 15.5 in. 15 x 7mm 200 carats $19
Chalcedony oval beads Catalog 1793 15.5 in. 16 x 13mm 230 carats $23	Chalcedony agate rectangle beads Catalog 1968 13 in. 34 x25 x 4mm 399 carats $19	Pink chalcedony bicone beads Catalog 2259 15.25 in. 12 x 9mm 147 carats $21
Blue chalcedony round beads Catalog 2280 15.5 in. 6mm 112 carats $19	Blue chalcedony round beads Catalog 2283 15.5 in. 6mm 112 carats $17	Blue chalcedony barrel beads Catalog 2284 10 in. 10 x 8mm 127 carats $16
Blue chalcedony cube beads Catalog 2285 8 in. 10 x 9mm 164 carats $17	Blue chalcedony round beads Catalog 2286 15.5 in. 6mm 107 carats $19	Blue chalcedony round beads Catalog 2287 15.5 in. 4mm 51 carats $12
Blue chalcedony rondelle beads Catalog 2288 16 in. 6 x 4mm 123 carats $16	Ruby chalcedony beads Catalog 2411 15 in. 8 x 5mm 192 carats $24	African blue chalcedony flat nugget strand Catalog 914 14 in. 19 to 39mm long 510 ct. $295 $225

Chalcedony single beads and bead groups. Includes carved pendant beads.

Blue chalcedony cube beads Catalog 5415 14 beads 6 x 6mm 38 carats $12	Blue chalcedony briolette beads Catalog 5420 9 beads 10.8 x 10.4 x 6mm to 13 x 11.4 x 6mm 46.15 carats $20(SOLD)	Carved chalcedony bird pendant Catalog 8025 1 carved bead 35 x 30 x 16mm 79 carats $27
Brown agate squirrel Catalog 8027 1 carved bead 43 x 26 x 17mm 100 carats $19	White opal bird pendant bead Catalog 8045 1 carved pendant bead 42 x 33 x 21mm 150 carats $29