Front
Method
Border
Left / Right
50.5 / 49.5
Top / Bottom
55.9 / 44.1
Yaw
+0.14° CW
Corner Readings · Millimeters
Top Left
X 2.50 · Y 2.80
Top Right
X 2.20 · Y 2.90
Bottom Left
X 2.40 · Y 2.30
Bottom Right
X 2.60 · Y 2.20
Official Grading Record
2024 · Surging Sparks
Condition Profile
RBH Grading Standard
Centering
9.0
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
50.5 / 49.5
Top / Bottom
55.9 / 44.1
Yaw
+0.14° CW
Corner Readings · Millimeters
Top Left
X 2.50 · Y 2.80
Top Right
X 2.20 · Y 2.90
Bottom Left
X 2.40 · Y 2.30
Bottom Right
X 2.60 · Y 2.20
Method
Border
Left / Right
50.0 / 50.0
Top / Bottom
56.7 / 43.3
Yaw
−0.10° CCW
Corner Readings · Millimeters
Top Left
X 3.00 · Y 4.00
Top Right
X 3.20 · Y 4.00
Bottom Left
X 3.20 · Y 3.00
Bottom Right
X 3.00 · 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 20, 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.