We can stamp your jewellery casting with your hallmark registered with Birmingham Assay Office or use our own JewelCast stamp.

Assay Stamp

We are able to stamp your casting with a hallmark if you require.

If you have your stamp registered with Birmingham Assay Office, we can use your sponsor mark, you just need to send an email to marie.brennan@theassayoffice.co.uk stating that Jewelcast have permission to use your stamp. Please copy us into this email at info@jewelcast.co.uk and make sure we know how your mark is made up, e.g. initials and additional letters.

If you do not have a stamp registered with Birmingham Assay office, and would like to set one up, please contact them directly on marie.brennan@theassayoffice.co.uk.

JewelCast Hallmarking

If you don’t have a stamp set up at Birmingham Assay Office you are able to use ours, which is JC.

If you would like to have your castings hallmarked please request this at the point of ordering under the “assay” part of your online order, or state this in your covering note.

Get In Touch

Contact us today, we’d love to hear from you. Whether you want to learn more about our services or are looking for casting advice, we’re always happy to help.

Hallmarking FAQ

Please note that the assay office will only mark complete pieces, for example, all shanks must have heads, all earrings must have posts and butterflies, all pendants must have bails etc.

Yes, please contact marie.brennan@theassayoffice.co.uk to set up your stamp and give us permission to use it on your behalf.

Yes, please request this at the time of ordering, and we will do our best to accommodate this for you

48 hours. Once your item has passed QC please allow 48 hours for you item to be hallmarked before your item will be ready for collection or despatch.

£5 for gold, or platinum items. Silver items start at £2.50 per item, reduce to 1.50 per item if more than 5 items are sent together.

Coronation Mark, Traditional marks, Date letters, Created in the UK stamps can all be added for a small additional charge.