Cobalt-Bearing Devitrified Glass
Glass with an Unusual Inclusion
Dyed and Sealed Lapis Lazuli
Assembled Opal Beads
Green Opal from Brazil
Cultured Pearls
Cat's-Eye Rutile
CobaIt-Blue Spinel
Turquoise with Simulated Matrix
To view the full section, download the PDF above.
Cobalt-Bearing Devitrified Glass
Glass with an Unusual Inclusion
Dyed and Sealed Lapis Lazuli
Assembled Opal Beads
Green Opal from Brazil
Cultured Pearls
Cat's-Eye Rutile
CobaIt-Blue Spinel
Turquoise with Simulated Matrix
To view the full section, download the PDF above.