Necklace with Picture Inside - Photo Projection Necklaces

How Does a Photo Projection Necklace Work? (The Optical Physics)

A Photo Projection Necklace (often searched as a necklace with picture inside) differs from traditional lockets by utilizing nanotechnology and optical refraction rather than a mechanical hinge. The core mechanism involves a specially cut convex lens made from high-clarity crystal or cubic zirconia.

Your custom image is processed using micro-carving technology, reducing the photograph to a 3mm diameter transparency embedded flat against the back of the lens. Because the front of the stone is curved (convex), it bends light passing through it. When you shine a concentrated beam of light (like a phone torch) through the back, the lens magnifies the micro-image and projects it onto a surface. This is the same principle used in vintage slide projectors, miniaturised for modern jewellery.

For a broader range of image-based keepsakes, including traditional engravings, you can explore our comprehensive range of custom photo jewellery and engraved keepsakes.

Material Integrity: Sterling Silver vs. Alloys

Durability is critical for projection jewellery because the central lens must remain scratch-free to ensure a clear image. At IfShe UK, we prioritise noble metals over cheap base alloys.

• 925 Sterling Silver: Our standard base metal composed of 92.5% pure silver and 7.5% copper to add tensile strength. Pure silver alone is too soft for the prong settings required to hold the projection stone securely.
• Rhodium Plating: For our "Silver" and "White Gold" look finishes, we use an electroplating of Rhodium (a platinum group metal). This prevents the natural oxidation (tarnish) that occurs when silver reacts with sulphur in the air.
• 18k Gold Vermeil: For gold finishes, we apply a thick layer (minimum 2.5 microns) of real gold over the silver base, ensuring the colour does not fade with daily skin contact.

Three Ways to View Your Hidden Photo

Our customers often ask how to reveal the secret picture inside. There are three distinct methods to engage with your customised photo necklaces with hidden pictures inside:

1. The Peek Method (Naked Eye): Simply hold the pendant close to one eye and look directly into the convex stone. You will see the image clearly inside the gem.
2. The Camera Method: Open the camera app on your smartphone. Place the pendant's convex surface gently against your phone's camera lens. The image will appear on your screen.
3. The Projection Method (Flashlight): In a dark room, turn on your phone's flashlight. Place the flat back of the pendant against the light source. Project the beam onto a white wall to see your memory enlarged. (Note: The projected image will be mirrored/reversed due to light refraction logic).

Meaningful Gifting: When to Give a Picture Necklace

Because of their hidden nature, these necklaces serve various emotional purposes beyond simple fashion accessories.

• Memorial & Remembrance: Keeping a photo of a passed loved one or pet "close to the heart" without displaying it to the public.
• Long-Distance Relationships: A tangible reminder of a partner. Many couples choose to pair these with our matching photo projection bracelets designed for couples for a complete set.
• Mother’s Day: A favourite for new mothers to carry a newborn's photo inside a subtle pendant.

Frequently Asked Questions