Custom-Cut and Custom-Shape Lab-Grown Diamonds
Coordinate non-standard outlines and facet references through drawings, dimensions, ratios, tolerances and first-piece approval for professional jewelry programs.
Send a Custom-Cut Brief
Custom cut versus a standard inventory shape
A standard shape can often be screened from existing supply using a familiar outline and grading brief. A custom cut begins with a design-controlled geometry or facet objective that may require dedicated rough selection, cutting review and a first-piece decision.
The buyer brief controls the result
Provide a shape drawing, exact dimensions, target ratio, facet reference, carat target, acceptable tolerance, quantity, certificate requirement and intended setting. Mark each field as fixed, preferred or flexible so trade-offs can be evaluated before quotation.
Geometry
Drawing, length, width, depth where relevant, ratio and outline reference.
Weight and tolerance
Target carat, acceptable range and which dimensions cannot change.
Facet intent
Reference image, facet diagram or description of the face-up pattern.
Program context
Quantity, matching requirement, report preference and intended jewelry use.
CAD, drawings and reference images
CAD seat dimensions explain setting fit, while a stone drawing defines the requested outline. Reference images help communicate visual intent but should not replace measurable acceptance criteria. Use controlled files and version names so the approved geometry is unambiguous.
Prototype and first-piece confirmation
The first piece should be reviewed for dimensions, weight, outline, symmetry, facet appearance and setting compatibility. Approval should record the accepted measurements and any permitted variation before repeat cutting begins.
Carat and dimensions cannot both be absolute
Cutting removes material, and small changes in depth, outline or facet execution affect finished weight. Buyers should identify whether face-up dimensions, ratio, appearance or carat carries the highest priority and define tolerances for the remaining fields.
Matched repeat production needs a tolerance record
Record the approved master dimensions, ratio, outline points, facet reference, weight range and visual review standard. Later pieces are compared with that record, but natural production variation still requires inspection rather than assumption.
Custom-shape pathways
Trapezoid, half-moon and kite requirements each need their own geometry and setting context. Use the relevant shape page to prepare a more precise brief.
Buyer questions
Can a custom cut be ordered by carat alone?
A useful custom-cut brief also needs dimensions, ratio, outline, facet intent, tolerance and setting use. Weight and exact dimensions cannot both be fixed without a permitted range.
Is a first piece always required?
The quotation confirms the approval method. A first-piece review is especially useful when the geometry, facet pattern or repeat-matching requirement is new.
Can custom cuts receive grading reports?
State the report requirement in the brief. Availability, format and feasibility are confirmed for the proposed custom-cut program.