Hallmarking
All Aquamarine jewellery has been assayed and hallmarked by Birmingham Assay Office. The legally required independent hallmark verifies the precious metal content and is a guarantee of quality.
Sponsors Mark - These letters are the sponsors or makers mark. In this case my initials, HR, for Harmony Rose.
Finesse Mark - This number indicates the purity of the metal. This is for Sterling Silver which is 925 parts in 1000 pure silver. The shape is an ellipse which denotes silver. There are other shapes for different metals.
Assay Office Mark - This symbol denotes where the piece was hallmarked. The Anchor is for Birmingham.