Back to all Boulder opal and diamond solitaire Opal 2.12ct DFR-OPAL-04 A undulating natural boulder opal set in yellow gold with feature diamond detail in white gold. POA Enquire about this piece Enquire about this piece Close Please enable JavaScript in your browser to complete this form.Name *Email Address *TelephoneMessageSend Message Send to a friend? Related Pieces Boulder opal and off-set diamond POA Opal with yellow and white gold £4,020 Boulder opal and diamond POA Boulder opal and a marquise £3,125