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).

Sienna Miller Engagement Ring

Sienna Miller is an American-born English model and actress who has starred in a number of movies such as Alfie and G.I. Joe.

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She has had a long ongoing on again off again relationship with actor Jude Law, who was her co-star in the film Alfie. They became engaged in 2004, but separated in 2005. Then, after some other relationships by both parties, she got back together again with Jude in 2009 and 2010.

Sienna's engagement ring consists of nine diamonds set in platinum on a gold ring, although she managed to lose one of the diamonds while wearing a mitten. The ring (before the loss) was worth about $40,000.