A high crown gives an Old Mine Cut a raised profile above the girdle. Its facets work with the table and pavilion to shape the diamond’s brightness, contrast and fire.
Start from the side, separate the crown from the total depth, then watch the same diamond in diffuse, directed and ordinary room light.
What “high crown” means
The crown is the part above the girdle. Total depth includes crown, girdle and pavilion, so a deep diamond may have a high crown, deep pavilion, thick girdle or all three. A true side view shows how the total height is divided between those parts.
Old Mine Cuts often combine a small table, high crown, large culet and short lower-half facets, but hand-cut proportions vary. Compare the actual profile and moving light pattern of each stone.
What the crown can change
Crown facets help shape brightness, contrast and dispersion. Small directed lights make spectral fire easier to see than broad diffuse light. Crown, table and pavilion still work together, and the lighting determines which effects are visible.
Three current dossier profiles
The dossier measurements below provide a starting point for comparing profiles. Use aligned side photographs to examine crown height.
| Public dossier | Measurements | Table and depth | Profile review |
|---|---|---|---|
| 10.05 Ct. D IF | 12.25 × 12.40 × 8.31 mm | 45% table, 67.0% depth | Locate the 45% table and girdle in a true side view. |
| 3.01 Ct. G VS2 | 8.24 × 8.05 × 5.57 mm | 51% table, 69.2% depth | Compare the crown and pavilion above and below the girdle. |
| 5.02 Ct. H VS2 | 10.39 × 9.11 × 6.41 mm | 51% table, 70.4% depth | Check how the 6.41 mm total height is divided in profile. |
Use the gallery to confirm identity and face-up pattern. For crown comparison, request side-profile images at the same angle and scale.
Read profile and motion together
Pause at a true side view and locate the girdle, table and culet. A tilted frame can exaggerate height, so check the opposite side. Then watch face-up movement and repeat from farther away to reduce camera obstruction.
Use three lighting conditions
| Lighting | What it reveals | Common mistake |
|---|---|---|
| Diffuse light | Overall brightness and persistent dark areas | Expecting strong fire from a large soft source |
| Small directed light | Fire and coloured flashes | Treating one spotlight clip as everyday appearance |
| Mixed room light | Daily balance of brightness and contrast | Comparing videos with different exposure or distance |
Ordinary room light gives a useful view of the balance you will see during daily wear.
What the report can settle
Match the report number, weight, dimensions, table and total depth. Examine crown height in a true side view. If exact crown comparison matters, use matched profile photography or a calibrated three-dimensional scan, then inspect the stone itself.
For related viewing methods, read Why Antique Diamonds Return Light Differently, the proportions guide and the guide to open culets.
Plan the setting from the side
The setter must support the actual girdle, protect vulnerable areas and leave enough culet clearance. For a pair, compare both crown profiles at the same scale so the finished heights read as a deliberate match.
High-crown checklist
- Match the report, weight and dimensions.
- Use matched side views with a clear girdle line.
- Separate crown, girdle and pavilion.
- Compare movement in diffuse, direct and room light.
- Repeat from farther away to test obstruction.
- Map condition before setting.
- Confirm support, seat height and culet clearance.
Request a matched profile review
Ask for aligned side photographs, unedited movement video, available reports and condition notes. Request a private diamond search or ask about inspection.
Editorial attribution: Updated by Mort for Imperial Cushions from current dossier records, 3 September 2026. Confirm the condition through loose-stone inspection.
Sources: GIA Guide to Old Mine Cut Diamonds; GIA Anatomy of a Round Brilliant; GIA Cut Grade Research Background.