OpenFacet – Blog
Exact Weight Pricing: Breaking Free from Legacy Weight Brackets
Apr 21, 2026
An explanation of why OpenFacet calculates and displays a unique per-carat price for every single microscopic difference in diamond weight, moving beyond traditional weight brackets.
Depth vs Ratio: Why Ratio is a Better Indicator for Fancy Shapes
Apr 18, 2026
An explanation of why ratio is a more reliable benchmark than total depth % for fancy-shaped diamonds, and why depth was intentionally left out of the OpenFacet dashboard.
Opting for Pure Data Over Rules of Thumb
Jul 25, 2025
OpenFacet’s study on diamond pricing evaluates Rule of Thumb (ROT) adjustments against real retail market data, prioritizing transparent, data-driven benchmarks over synthetic corrections for accurate and reliable valuation.
Rational Prices, Irrational Buyers: Modeling Behavioral Distortions in Diamond Valuation
Jun 21, 2025
Diamond pricing deviates predictably from physical value due to cognitive biases. OpenFacet applies selective, empirically tuned corrections that reflect observed market asymmetries while preserving underlying model structure.
OpenFacet's Transparent Diamond Pricing: A Framework Grounded in Strategic Analysis
Jun 1, 2025
A replicable diamond pricing model built on structured retail data, designed in response to academic research on inefficiencies in traditional valuation systems.
Real DCX: Adjusting for USD Distortion in Diamond Price Indices
May 25, 2025
We introduce the Real DCX — a macro-adjusted variant of the DCX Composite Index that corrects for USD strength and purchasing power drift. This refinement enables more accurate interpretation of diamond market dynamics, especially in FX-sensitive environments.
DCX Diamond Index Basket: Specification and Weighting Disclosure
May 23, 2025
We finalized the initial composition of the DCX basket—a high-turnover, volume-weighted set of natural diamond specifications built from public market data and used to calculate the DCX Composite Index.
OpenFacet: A Transparent Framework for Natural Diamond Price Discovery
May 11, 2025
Today we launch OpenFacet — a transparent, data-driven methodology for reconstructing diamond price matrices from public retail listings. Built around GIA-certified, fluorescence-free natural diamonds, OpenFacet enables consistent, explainable pricing across carat, color, and clarity.