What is DiamCalc and who benefits from it
What is new in the DiamCalc?
High Dynamic Range Demo movies
Caustic Movies in the next versions of DiamCalc
Scenarios - Demo files demonstraite different possibilities and effects of the program
Press Release DiamCalc 3.0 and DiamCalc 3.0 Pro launched by OctoNus
Diamond 3DBook free full version on-line
Video Tutorial - Using DiamCalc & GEM Adviser
DiamCalc Internal Cuts
External cuts (DLL)
Versions history
System requirements
Information for Mac users
Online Store
Illustrated reports
Download DiamCalc
DiamCalc 3.2 beta Documentation (PDF)
External Cuts gallery (Dll)
Online Store
Complete guide
Quick guide on Key operations (How to..)
OctoNus spread & AGS spread
Cut parameters
Cut Quality Estimation
How to Create High dynamic range (HDR) panorama
3DCalc Pro

3DCalc family
DiBox 2.0
GemAdviser Free Version
Helium IG
Helium Polish
Helium Rough
Helium Tender
M-Box 2.0
M-Box 1.5
Oxygen DZ
Oxygen HIG
Oxygen Immersion
Oxygen Inclusion
Oxygen Microscope Server
Oxygen Viewer Free Version
Oxygen XRay Server
Pacor Client
Stereo Viewer Free Version

PACOR - Advanced Computer technologies for Processing of Rough diamonds
Laser Mapping of Concavities
Scanning major and minor symmetry features
Technology patent "A method and apparatus for locating inclusions in a diamond stone"
Immersion Glass
DiamCalc : Guide
Complete Guide
  1. Estimating the mass of the stone and calculating cut parameters
  2. Support for different cuts and a large set of parameters
  3. Support of external cut designs and diamond 3D-models- GemCad, AutoCAD and Sarin files import (registered version only)
  4. Working with different types of gemstones
  5. Finding unknown parameters (mounted diamonds, estimating proportions of diamonds before they are cut) and parameter fixing
  6. Selecting measurement units and parameters to show
  7. Appraising cut quality (GIA, HRD, AGA, Russian TU systems) and estimating the price of the diamond
  8. Different visual presentations of diamond, fine-tuning images to produce realistic view of a diamond
  9. Detailed description of DiamCalc appraisers
  10. Appraiser file format
  11. OctBrill.txt file format
  12. Price list file format

Appraising cut quality (GIA, HRD, AGA and Russian TU systems) and estimating the price of the diamond

OctoNus Diamond Calculator has two major features that help to evaluate diamonds:

  • Appraising diamond quality and quality of particular diamond parameters (girdle size, pavilion angle, etc.);
  • Pricing diamonds basing on price lists with discounts for diamond shape, cut quality, color and clarity.

There are several built-in systems of diamond grading ("appraisers"): HRD, GIA, AGA and Russian TU. Moreover, the data of appraisers is stored as a text and can be edited, so you can change criteria of appraising diamonds or even add your own grading scheme.

Price lists are also stored as a text, so they can be customized, including possible discounts for diamond shape, color and clarity. Also, there is a free DBFCONV utility which provides a way to use Rapaport price lists with Diamond Calculator.

DISCLAIMER. The numerical representation of grading systems used by DiamCalc is not an official data of the corresponding bodies. Although the data was intended to describe HRD, GIA, AGA and Russian TU grading systems as precise as possible, some ambiguities or differences with the official data might exist. OctoNus Software recommends that you check appraiser data and modify it as necessary before using it to grade diamonds for commercial purposes.

DISCLAIMER. The price lists supplied with DiamCalc are sample ones. Although they are similar to real price lists used in the diamond industry, OctoNus Software does not guarantee that you can buy or sell diamonds at the price that was calculated by DiamCalc on the basis of the supplied price lists. OctoNus Software recommends that you verify price list data and modify it as necessary before using them for appraising diamonds for commercial purposes.

You can see how DiamCalc grades diamonds for exact criteria of diamond grading provided by DiamCalc.

How DiamCalc prices diamonds explains how the price is calculated depending on diamond color, clarity, shape and other parameters.

Quick guide on Key operations (How to..)