Quick and Easy Buying Guide

Carat weight: 1 carat = 200 milligrams = 6.5 mm diameter. Doubling weight doesn't double diameter.

Diamond clarity: FL/IF/VVS/VS = super expensive, near perfect. SI = best value if you can check a photo for obvious inclusions (defects).


Color: D-G = colorless, expensive, only if you have money to burn. H-J = best value. Can go lower in gold metal settings than white metal.

Cut: Better cut ratings let more light into a diamond, making it sparkle more. Very important property, don't skimp here.

Set a budget and minimum cut (Premium). Go J color for gold and I/H for white metals. Go searching for SI1/SI2 clarity diamonds at James Allen. Pick a diamond with small/no inclusions. Choose a ring setting and buy it risk-free (60-day returns).

Fergie Engagement Ring

Her real name is Stacy Ann Ferguson, but the world knows her as Fergie. She had some fame as a youngster, but she hit the big time when she fronted the group the Black Eyed Peas, with whom she has had three number one singles on the Billboard Hot 100.

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Fergie's other half is the actor Josh Duhamel, whom she met on the set of his show Las Vegas back in 2004. They dated for five years as both of their careers blossomed, before marrying in 2009.

For her engagement and wedding rings, as well as all her wedding day jewellery, she commission Brazilian jeweler H. Stern. Her engagement ring features a 4 carat centre round shape diamond placed in the middle of a star set on top of her ring, the star itself set with multiple smaller diamonds.