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).
1.37 Carat Diamonds
If the diamond is described as being 1.37 carats in weight, it can also be described as being a 137 point diamond.
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Diamond carats, points and normal units of milligrams can all be converted between - this 1.37 carat diamond for example weighs 274 mg.
When you see a 1.37 carat diamond, expect to see about 7.26 mm worth of diamond.
Savvy diamond buyers have learnt to search for diamonds that do not have round numbers in their carat weight - for example, these buyers will search for a diamond with the carat weight just below one or two carats.
One thing to consider that may stop you overspending on a diamond is how large the diamond will appear when it is finally placed on the woman's hand. Often the buyer of the diamond is happily surprised by how large the diamond appears when it is finally placed on the hand. Looking around the internet at online diamond stores, you may be tempted to think that a four or five carat diamond is large. You couldn't be more wrong - the golden jubilee diamond is an example of how big diamonds can really be - it is 545 carats, or a weight of more than 100 g, which is about a quarter of the weight of a can of coke.
First-time diamond buyers who are in a hurry often just focus on the diamond carat size, which is a big mistake - other properties such as the clarity of the diamond are important in getting a diamond which is attractive not just in terms of its size, but also its appearance.
I never hated a man enough to give him his diamonds back. Zsa Zsa Gabor .