Rough Color Grading

How Cutwise estimates the color of the diamonds a rough diamond will yield, from its ViBox 2.0 capture and before anything is cut.

Rough Color Grading estimates what color the polished diamonds cut from a rough diamond will be. It works from the rough diamond itself, before anyone cuts it.

Watch the walkthrough (7 min). It shows how to prepare the rough diamond, start a run and read the result.

Cutwise reconstructs the light absorption spectrum of the rough diamond from a ViBox 2.0 capture. It renders diamonds through that spectrum and estimates a grade for every render twice: on the D–Z scale and on the fancy color scale. Each estimated diamond comes back with renders, both grades and a verdict. A card can also show the Color Name, Uniformity and FCRF subgrades. FCRF subgrades follow the grading methodology of the Fancy Color Research Foundation (FCRF).

Two steps

The process has two separate steps. You start each step on its own, and each step is a task of its own.

Step What it estimates Started from Charged
Rough Color Grading four example diamonds: a round and a radiant at two typical yields Estimate Color → Rough Color Grading once per rough diamond
Plan estimation the diamonds you actually plan to cut Estimate Color → Estimate plans from Cutwise project or Estimate plan from STL or ASC file per estimated diamond

The first step is mandatory and runs once per rough diamond. It reconstructs the spectrum, and the second step reuses that spectrum. So you can estimate plans only after the first step has finished. After that, you can add plans at any time, a few at a time, from two sources:

  • A Cutwise project: the solutions of the HP Carbon project uploaded to Cutwise for this rough diamond.
  • An STL or ASC file: a model of a planned polished diamond, made in any other software.

The price of each step is listed in Rough Color Grading pricing.

The pages

  • Before You Start

    What has to happen before Rough Color Grading can start - a ViBox 2.0 capture of the rough diamond and a rough model on Cutwise.

  • Running Rough Color Grading

    Start the first step of Rough Color Grading, follow it to the end, and know what to do when it fails.

  • Estimating Planned Diamonds

    Estimate the color of the diamonds you actually plan to cut, from an HP Carbon project or from STL and ASC files.

  • Reading the Results

    What the Color estimation block on the rough diamond page shows, element by element, and which decisions about the rough diamond it supports.

  • FCRF Price Estimate

    Price a planned fancy diamond on the FCRF price scale, and find out why the Evaluate Price button can be greyed out.