Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Know with confidence that your D-to-Z diamond is natural with GIA diamond grading reports. Included in the reports is a full quality assessment along with polish, symmetry and fluorescence.

May 3, 2024 · Peering inside a natural diamond can give scientists an unparalleled perspective into the earth’s interior. Diamonds capture a lasting record of deep mantle processes over …

Mar 17, 2025 · This natural 2.01 ct Fancy Light brownish greenish yellow diamond octahedron was faceted to highlight an octahedral-shaped cloud inclusion. Photo by Nathan Renfro.

Examines a very large dataset of colorless to near-colorless diamonds submitted to GIA and evaluates their diamond type and spectroscopic properties.

A well-shaped, transparent, octahedral diamond crystal with sharp, square edges is called a glassie. While the most common habit of gem diamond is the octahedron, perfectly shaped …

18. GIA CUT SCALE e GIA Diamond Cut Grading System. Available for standard round brilliant cut diamonds in the D-to-Z color range and Flawless-to-I3 cl

Diamonds have a long history as beautiful objects of desire. In the first century AD, the Roman naturalist Pliny stated: “Diamond is the most valuable, not only of precious stones, but of all …

Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Jul 25, 2016 · Natural diamond crystals (left) typically form in rounded octahedral shapes caused by conditions deep within the earth. They’re brought to the surface by volcanic eruptions that …