Natural Diamonds | Diamond Stone – GIA C
Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.
8.52 carat [ct] octahedral shape crystal - GIA 4Cs
This 8.52 carat [ct] crystal came from the small African country of Lesotho. It has the tell-tale octahedral shape of a natural diamond.
How to Buy a Quality Diamond - GIA 4Cs
See more on 4cs.gia.eduA diamond’s beauty comes from both nature and nurture. Nature creates diamond rough of different colors and with different inclusions. Humans cut the rough, choosing which of the 4Cs(Cut, Color, Clarity and Carat Weight) to prioritize. Should the cutter cut most of the inclusions away to get a high-clarity stone? Or s…- Estimated Reading Time: 8 mins
Explore Some Common Diamond Shapes - GIA 4Cs
Aug 26, 2014 · For more information on how to differentiate between diamond shape and cut, go here. Read on for GIA’s Diamond Shape buyers guide to some of the most frequently seen diamond shapes, and their defining attributes.
GIA unveils its “Tower of Brilliance” - JCK
Nov 12, 2002 · The crystal octahedron composed of an outer glass structure resembling the diamond crystal shape, with a metallic replica of a round brilliant-cut diamond inside. It is …
Graphite Inclusions Forming Octahedral Outline in …
GIA’s New York laboratory recently received a 1.30 ct Fancy brownish greenish yellow diamond (figure 1) containing an octahedral-shaped inclusion outlined by minute crystal inclusions along the junctions of the crystal faces.
Diamond Crystals: Shapes and other Physical …
Diamond belongs to the cubic crystal system, which is the most symmetrical of crystal systems. The basic crystal shape, or habit, of diamond is the octahedron; a form with eight equal triangular sides, looking like two pyramids connected …
Gem Gallery - Diamond - gemkids.gia.edu
The most common shape for rough diamond is the octahedron, which looks like two pyramids stuck together, bottom to bottom. Notice the pyramid points on these rough diamonds. - Photo …
Diamond - Gemological Institute of America
A diamond‘s basic crystal shape is the octahedron. The surface of an octahedron sometimes displays little triangle shapes called “trigons.”
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