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).
1.57 Carat Diamonds
Each carat in a diamond is equivalent to 200 mg, so this 1.57 carat diamond weighs 314 mg. Although there is a strong correlation between the carat weight of a diamond and its width, this does not guarantee that every 1.57 carat diamond is 7.60 mm wide.
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Be careful of assigning too much importance to the carat weight of the diamond while neglecting other properties such as the girdle thickness, which is to wide can make the diamond appear smaller than other diamonds of the same carat weight.
Counter intuitively, a diamond that is twice as heavy as another diamond is a lot less than twice as big in terms of its diameter.
Guard well your spare moments. They are like uncut diamonds. Discard them and their value will never be known. Improve them and they will become the brightest gems in a useful life. Ralph Emerson .
Diamonds with a size of 1.57 carats are aplenty, but diamonds with a size of 1.57 carats and all the other desirable properties of the diamond are not so common - so don't forget to think about these other properties. There's a lot of hearsay on the internet about the average size of a diamond used in a typical diamond engagement ring - it's around half carat - but that of course doesn't give you any information about the typical clarity or colour of the diamond, and that in itself should tell you how useless that statistic is in isolation.
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.
Carat size is only one that property out of a number that you should be considering. You should also consider a diamond other properties such as cut, because this will have a drastic effect on how well the diamond sparkles.
