A photo cube is a translucent fabric or plastic tent that diffuses light evenly around a gemstone or jewellery piece during photography. Also called a light cube or light tent, the device eliminates harsh shadows and pinpoint reflections by scattering illumination from external lamps through translucent walls onto the subject. Photo cubes are standard equipment for product documentation in retail, online listings, and routine inventory imaging in the trade.

Construction and sizes

A photo cube is typically a collapsible cube of nylon or polyester stretched on a wire or rod frame, with white or grey interior surfaces and one or more openings for the camera. Standard sizes range from 30 cm cubes for individual pieces of jewellery to 1 metre cubes for larger objects and assemblages. Light is supplied by lamps placed outside the tent, usually two or three sources at the sides and top, with the soft fabric diffusing the beam onto the subject.

White interiors are typical and produce the cleanest neutral background. Grey interiors are useful for highly reflective metals such as polished platinum or rhodium-plated white gold, where pure-white surroundings can blow out highlights or wash detail from polished surfaces. Some cubes include interchangeable backdrop sheets in white, black, and grey for different aesthetic results.

Use in jewellery and gemstone photography

For routine inventory and listing photography, a photo cube combined with two LED panels and a tripod-mounted camera or phone produces consistent, even illumination across a small jewellery subject. Polishing cloths, plain card backdrops, and small tweezers complete a basic bench setup. The diffuse light reveals form and surface texture without the distracting reflections that direct flash or bare bulbs produce on faceted stones and polished metal.

Photo cubes are less suited to capturing the optical phenomena that demand directional or pinpoint illumination — the dispersion fire of a brilliant-cut diamond, the asterism of a star sapphire, the play-of-colour in a precious opal. For these subjects, the cube provides a useful base level of fill light, but a directional spotlight or carefully placed reflector is needed to bring out the phenomenon. Trade photographers commonly combine a photo cube for fill with one or more directional sources for highlight control.

Limitations and alternatives

The principal limitation of small photo cubes is internal reflection: every wall of the cube can register on a polished metal subject as a faint white square. This is not an issue for matte or stone-only subjects but can complicate ring and bracelet photography on highly polished settings. Black flag cards placed strategically inside the cube, or post-processing retouching, are the usual remedies.

Larger commercial photography for advertising and editorial work typically uses bespoke softbox lighting and full studio cyclorama backdrops rather than off-the-shelf photo cubes. The cube is the workshop and bench tool; the studio is the production tool.

In the trade

For the working jeweller and the small online retailer, a 50 cm photo cube with two 5500 K LED panels and a smartphone or basic mirrorless camera is sufficient for the bulk of inventory photography. Consistent results depend more on disciplined backdrop choice, white balance, and post-processing than on equipment cost. The Jewelers Mutual and GIA recommendations on photographic documentation for insurance purposes assume the kind of even, well-lit imagery a photo cube reliably produces.

Further reading

• GIA Gems & Gemology — gem photography articles
• International Gem Society — gem photography techniques
• Jewelers Mutual — jewellery documentation guidance