All Opal Gems silver jewellery is 925 sterling silver, unless commissioned otherwise (9ct Gold).

Hallmarking is available on request if commissioning a piece of Opal Gems Jewellery. This usually takes an extra 2 weeks with an additional cost of £30 per item.

All pieces of jewellery that weigh over 7.78 gms are hallmarked as required.

Opal Gems is registered with the Birmingham Assay Office, who independently tests and guarantees that our jewellery is 925 sterling silver, and carries out the hallmarking.

You can find more information about hallmarking on the Birmingham Assay Office website:

Click here to go to: http://www.theassayoffice.co.uk/

If you have any further questions about hallmarking or the assay process then please get in touch at [email protected]

Opal Gems unique Sponsors Mark is JLB.