Front
Method
Border
Left / Right
54.5 / 45.5
Top / Bottom
54.6 / 45.4
Yaw
+0.08° CW
Corner Readings · Millimeters
Top Left
X 2.80 · Y 2.60
Top Right
X 2.20 · Y 2.70
Bottom Left
X 2.60 · Y 2.20
Bottom Right
X 2.30 · Y 2.20
Official Grading Record
2024 · Surging Sparks
Condition Profile
RBH Grading Standard
Centering
9.5
Corners
10.0
Edges
10.0
Surface
9.5
Supporting Documentation
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Released Grading Record
Border mode calculates centering and yaw from the recorded corner-border measurements. Landmark mode calculates LR/TB from direct design-landmark distances and records yaw independently when a reliable horizontal or vertical reference is available.
Dimensional measurements are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty. Clockwise yaw is positive (+); counterclockwise yaw is negative (−). “Not measured” means no reliable yaw reference was available.
Method
Border
Left / Right
54.5 / 45.5
Top / Bottom
54.6 / 45.4
Yaw
+0.08° CW
Corner Readings · Millimeters
Top Left
X 2.80 · Y 2.60
Top Right
X 2.20 · Y 2.70
Bottom Left
X 2.60 · Y 2.20
Bottom Right
X 2.30 · Y 2.20
Method
Border
Left / Right
46.8 / 53.2
Top / Bottom
55.1 / 44.9
Yaw
−0.02° CCW
Corner Readings · Millimeters
Top Left
X 2.80 · Y 3.70
Top Right
X 3.40 · Y 3.90
Bottom Left
X 3.00 · Y 3.10
Bottom Right
X 3.20 · Y 3.10
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
Documented corner, edge, and surface conditions associated with this grade.
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
1 Blemish
Blemish 01 · Surface
Rear · A3, B3, C3, D3
Light Partial Print / Refractor LineCertified
September 18, 2026
Record Revision
1
This digital record is tied to the exact eight-digit certification number printed on the RBH label. RBH does not expose customer information, grader notes, or private scoring weights in the public registry.