The physical dimensions that define a diamond.
Length, width, and depth measurements explained.
The ratio of table width to total diameter.
How depth ratio affects light performance.
How the crown angle influences fire and brilliance.
The critical angle for light return.
Durability, hidden weight, and setting implications.
Why the culet exists and when it matters.
How L/W ratio defines the shape of fancy cuts.
Visual size for the weight — face-up area.