Diamond knowledge
Everything we wish more sellers knew.
Honest, in-depth guides to diamond grading, certificates and the second-hand market — written by Jonathan Williams, GIA member with fifty years’ experience. Last updated May 2026.
The 4 Cs of diamond grading explained — a 2026 guide
Carat, colour, clarity and cut. What each really means and how each moves your sale price in the current market.…
Read guideGIA vs IGI vs HRD vs EGL — which certificate matters most?
A side-by-side comparison of the four major laboratories and the price implications of each. Lorem ipsum dolor sit amet, consectetur…
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