The two-minute setup
- Wipe the phone lens with a clean microfibre cloth.
- Place a sheet of matte white, pale grey or neutral card beside a window—not in a beam of direct sun.
- Rest the marble on a tiny ring of removable putty or a plain rubber washer so it cannot roll.
- Turn off the flash and nearby coloured lamps.
- Move the phone closer instead of using digital zoom, but stop before the camera loses focus.
Take these two identification views
If a mark or chip matters, take a third close-up for your records. Keep the first two images broad enough to show the whole object; an extreme crop can make construction impossible to read.
- 1
The pattern view
Fill most of the frame with the marble. Focus on the clearest ribbons, patch, swirl, core or vanes while keeping the true outline visible.
- 2
The opposite view
Rotate the marble roughly 90–180 degrees. Show where the pattern travels, plus any second seam, pontil, cut line or area hidden in the first photograph.
Light the glass, not the glare
Soft side light reveals surface texture and keeps highlights from blowing out the pattern. If the window reflection is too hard, hang a white curtain or tape tracing paper to a frame in front of the light source—never onto a hot lamp.
Transparent marbles can benefit from a second photograph near a white card that bounces light back through the glass. Keep at least one normal reflected-light view so colour and surface condition remain honest.
Keep colour and size believable
- Avoid filters, portrait mode, dramatic “vivid” settings and automatic background replacement.
- Tap the marble on screen to set focus and exposure; lower exposure slightly if the white areas lose detail.
- Measure with callipers and enter the number separately. A ruler in the photograph is useful context but less precise on a curved object.
- Do not let a bright coloured support show through clear glass and change the apparent base colour.
Quick fixes for common photo problems
| Problem | Try this |
|---|---|
| Camera focuses on the background | Add more light, tap the marble and back away a few centimetres |
| White glare hides the pattern | Move the light farther to the side and diffuse it |
| Image looks yellow or blue | Turn off room lights and use one neutral light source |
| Only one side looks sharp | Keep the phone parallel to the marble and avoid extreme close focus |
| Marble keeps rolling | Use a tiny neutral putty ring hidden beneath it |
Before you upload
Check both images at full size. You should be able to see the edge, the main pattern and at least one construction clue without guessing. Retake a blurry view now; it is faster than correcting a confident-sounding identification built on missing detail.
Sources and further reading
This guide is an editorial overview, cross-checked against the specialist references below.
- Online Marble Identification Guide — MarbleCollecting.com
Identification and value estimates are research starting points, not authentication, a formal appraisal or a guarantee of sale price.