Tiffany & Co Shell and Diamond 18kt Gold Necklace

Q: What is the chain length and where will it sit on the neck?
A: The listed size is approximately 45 cm (about 18 inches). On most wearers this sits around the collarbone, making it ideal for layering or everyday wear. If you prefer a different drop, please see the question below on resizing options.

Q: Is the diamond certified?
A: Small accent diamonds in Tiffany jewellery are generally not accompanied by individual diamond certificates. Tiffany diamond certificates are typically issued for qualifying engagement diamonds; for vintage jewellery, original paperwork is rarely present unless noted. Please refer to the product information section for everything included with this piece.

Q: What hallmarks should I expect to see on an 18ct Tiffany necklace?
A: Authentic pieces typically carry clear, precise stamps such as Tiffany & Co. branding and a fineness mark like 750 indicating 18ct gold. These marks are usually found on the reverse of the pendant and/or near the clasp tag.

Q: Is the gold solid 18ct or gold‑plated?
A: Tiffany gold jewellery described as 18ct is crafted in 18ct gold. 18ct (often stamped 750) means the alloy is 75% pure gold blended with other metals for strength and colour.

Q: Can the chain be shortened or lengthened?
A: Many Tiffany necklaces can be adjusted by adding or removing jump rings or replacing the chain; feasibility depends on the specific design. Tiffany Client Care or a trusted jeweller can advise on options, timing and costs.

Q: Can I wear it in the shower, pool or at the gym?
A: It’s best to remove fine jewellery before showering, swimming or exercising. Soaps, lotions, chlorine, salt water and sweat can dull gold and affect settings over time.

Q: How should I clean and care for 18ct gold and diamond jewellery at home?
A: Use a non‑abrasive jewellery cleaner made for gold or a mild soap solution with lukewarm water. Gently brush with a soft brush, rinse and pat dry with a lint‑free cloth. Avoid harsh chemicals and ultrasonic cleaners unless a professional advises they are safe for this specific piece. Store it separately in a soft pouch to prevent scratches.

Q: There are light surface marks—can they be polished out?
A: Fine hairline scratches are normal on vintage 18ct gold. Professional polishing can reduce their appearance and restore shine; speak with Tiffany Client Care or a reputable jeweller for an assessment.

Q: What is included with this item?
A: Everything included is listed in the product information section on this page. If a Tiffany box, pouch or paperwork is not specified there, it is not included with this necklace.

Q: How does A Retro Tale authenticate this piece?
A: Every item is carefully examined by our in‑house experts using multi‑point checks of materials, hallmarks, construction and setting work. We stand behind the authenticity of all items we sell and are happy to provide additional details on request.