How do I identify an authentic art deco solitaire?

Authentic pieces exhibit period-specific manufacturing techniques, such as hand-forged platinum settings and old-cut diamonds rather than modern brilliant cuts. Look closely at the construction under magnification to spot traditional hand-pierced gallery work and hand-applied milgrain. Assay marks and French import or maker's stamps also help confirm the era of production. Evaluating the overall geometric weight and styling provides further context for dating the ring accurately.

What is an old European cut diamond?

An old European cut is a traditional diamond shape hand-faceted before modern optical symmetry was standardised in the mid-twentieth century. These stones feature distinctive proportions, including a smaller table and a noticeable open culet visible at the base. In dim lighting conditions, these cuts produce a broad, patterned flash rather than the pinpoint sparkle of modern stones. This optical characteristic remains a defining feature of authentic interwar diamond jewellery.

Can the ring size be adjusted?

Most gold and platinum bands can be resized by a skilled jeweller experienced in handling antique pieces. The process requires careful consideration to preserve hallmarks and delicate shoulder decorations situated near the band. Consulting a specialist ensures the structural integrity of the setting remains unaffected during the adjustment. Certain pieces with continuous channel work or intricate gallery designs may require specialised alteration techniques.