G SI1 Natural Diamonds

G colour SI1 clarity is a value-focused combination that delivers excellent visual results for budget-conscious buyers. G colour appears white in all settings, while SI1 clarity means inclusions may be visible under magnification but are typically not visible to the naked eye — especially in brilliant-cut shapes.

SI1 is the grade where careful selection matters most. In round brilliant, cushion, and oval cuts, the facet pattern typically masks SI1 inclusions completely. In step cuts like emerald and Asscher, inclusions are more visible due to the open facet structure.

At MOH London, our gemmologists inspect every SI1 diamond to confirm it is eye-clean before recommending it. This hands-on verification is essential at this clarity grade and is something automated diamond search engines cannot provide.

Frequently Asked Questions