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).
0.73 Carat Diamonds
If you're interested in the normal metric weight of a 0.73 carat diamond, it is 146 mg.
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There are hundreds of thousands of diamonds available online, which can be quite a daunting prospect if you're trying to narrow your choices down. One tip is to add another property of the diamond to the phrase that you're entering into your web browser - you could enter vs1 clarity alongside 0.73 carat diamonds.
Diamonds are nothing more than chunks of coal that stuck to their jobs. Malcolm S. Forbes .
For prospective buyers who are really focused on the size of a stone but not the material or quality, consider changing to a different gemstone apart from diamond. Some other gemstones are significantly less dense than diamond, which means for a certain carat weight they will have a larger volume and hence will look bigger to the naked eye. Some unethical store assistants will talk about average diamond size in trying to pressure couples into buying a diamond ring more expensive than they can afford - even though the average is around half carat, you should be buying a diamond based on what you can afford, and what you as a couple would feel comfortable buying.
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.
Note when looking at total diamond weight, some of the online stores such as blue nile will give a total diamond weight for a pair of stud earrings, but the actual total diamond weight will only approximately be what is specified - check the fine print to avoid being caught out. 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.
