Prepared by the Imperial Cushions editorial team. Laboratory terminology is retained where a report is cited; historical context and dealer judgment are identified as interpretation.
An elongated old mine cushion gives a ring or pendant a clear direction. Its length, shoulder shape and central facet pattern determine how that line reads on the body.
Use the dimensions to picture the shape
The 5.03 ct F VS1 cushion measures 11.72 × 8.91 mm, a ratio of 1.32. The 5.16 ct G SI2 cushion measures 12.35 × 9.21 mm, a ratio of 1.34. Their ratios are close; the second stone is larger in both face-up dimensions.
Compare the corners and where each outline carries its width. A fuller shoulder can make a stone feel softer, while straighter sides give it a more rectangular appearance.
Watch along the length
Track the broad reflections from end to end during a slow rotation. Check any dark central band from several distances and angles. Then turn the stone across the finger to see which orientation you prefer.
Give the setter a condition map and accurate side views so vulnerable girdle areas and culet clearance can be protected. The face-up size guide offers further dimension comparisons.
See the details in a stone
5.03 Ct. F VS1 Old Mine Cushion
A 1.32 length-to-width ratio and softly rounded cushion ends.
6.71 Ct. G VS1 Old Cut Cushion
A longer cushion outline with a 36% table and broad central facets.