Oura Gold PendantThe Oura pendant is a one of a kind piece featuring an opal stone. This is a solid 9ct gold pendant. Pendant size is approximately 18mm x 9mm. No chain included, if purchased you will only receive the pendant. Please note: On the Mohs hardness scale, opal is placed at about a 5. 5 to 6. 5. Comparing that to a diamond for example which is a 10, means that opals are a soft gemstone making them very susceptible to getting damaged if not cared for