Natural Mexican Fire Opal, chalk, irregular Natural Mexican Fire Opal, chalk, treated with fire, irregular (The fire treatment is to change the color of the chalk opal. Colors can vary)
Natural Mexican Fire Opal, cantera capuchon style and irregular Natural Mexican Fire Opal treated, cantera capuchon style and irregular
Natural Mexican Fire Opal in capuchon style Price varies depending on quality and size
Opal.
