What is calibre cut sapphire jewellery?

Calibre cut sapphire jewellery comprises rings, bracelets, and brooches set with specially shaped blue sapphires that fit tightly together to form geometric patterns. These items date primarily from the early twentieth century and rely heavily on platinum mounts. The technique allows jewellers to create sharp lines and solid blocks of colour that define the aesthetic of the period. Diamonds typically accompany the sapphires to provide maximum contrast.

How do I care for antique sapphire jewellery?

Cleaning antique calibre cut pieces requires gentle handling using warm water and a soft brush, avoiding harsh chemical dips that might harm the delicate metal settings. Because the stones are fitted closely together without much space underneath, professional inspection helps ensure the security of each tiny gem. Storing each item separately in a lined box prevents the platinum or gold mounts from scratching against other pieces. Regular checks by a specialist will maintain the integrity of the antique claw and channel work.

How can I identify Art Deco sapphire pieces?

Art Deco sapphire pieces display rigid geometric motifs, symmetrical layouts, and a frequent pairing of platinum with calibré cut blue stones and old cut diamonds. The mounts often feature intricate openwork and millegrain details that enhance the linear design. While Edwardian jewellery leans towards lace-like lightness, Art Deco work favours bold architectural shapes and stark colour contrasts. The presence of French hallmarks on platinum settings can also point towards Parisian workshops of the era.

Are these sapphires natural?

The sapphires found in these period pieces are natural gemstones mined and cut long before the widespread adoption of modern synthetic stone production. Their internal characteristics often reflect the geological origins typical of antique jewellery. Expert certification accompanying certain pieces verifies their natural status and details any treatment history. The depth and variation of colour within the stones further support their natural origin.