Not every certificate is the same. An overview of the best-known diamond grading laboratories and how their standards differ.
A GIA report contains far more than just the 4 Cs. We explain how the document is structured, what the plotting diagram shows, and which security features make a diamond uniquely identifiable.
Fluorescence is a natural property found in many diamonds and noted on GIA reports. This article explains what fluorescence is, how it is measured, and why it is often misunderstood.
A factual overview of formation, identification and certification of natural diamonds compared to lab-grown diamonds.
A look at the technical process that transforms an unremarkable rough diamond into a polished stone – from rough analysis to final polishing.
A diamond's price is not arbitrary but results from an interplay of clearly defined factors. This article explains the mechanisms that shape pricing in the diamond market.
How are diamonds safely stored after purchase? An overview of certification, professional custody and complete documentation.
Most diamond dealers stop offering diamonds above 10 carats. STIG GROUP holds larger stones directly in stock — a rare offering in the market.
A single stone from a dealer, or structured ownership through STIG ROCK? An objective comparison covering documentation, storage, and ongoing management.
Real ownership of GIA-certified diamonds, secured by a purchase contract, invoice, and certified storage. Here's how the STIG ROCK system works from entry to management.
Cut, Color, Clarity, Carat — the 4 Cs determine a diamond's quality and value. Here's how the GIA grades them and why the certificate matters when buying.
The Kimberley Process is the international standard against conflict diamonds. Here's how it works and how STIG GROUP applies it across the entire supply chain.