Not much information about the quality of a diamond exists before its grading. Diamonds undergo an in-depth 4Cs evaluation process. Color, clarity, metric carat, and cut are the standard language in the jewelry industry. As you fact-find, you will regularly come across this diamond jargon.
According to GIA standards, colorless diamonds generally have a high value. But you can also find and buy colored diamonds; a synthetic diamond, for instance, can be modified into a fancy-colored diamond. Diamonds could also be natural but undergo several treatment stages and a degree of color change. Full-fledged colorless diamonds are rare and highly sought after in the real sense. You will likely encounter a range of near colorless and colored stones online and at jewelry shops. The most common natural diamond colors are light-yellow and light brown. GIA uses a color spectrum to show how close a diamond is to colorlessness.
Side note: The color you see in a pictorial illustration or digital image of a diamond could be deceiving because it may differ from the actual color observed under a microscope. Do not trust your naked eye to judge color. Instead, use a jeweler's loupe to confirm the exact color.
A diamond carat is not intricate; it is a simple way to gauge the weight of the diamond. A single carat translates to approximately 0.2 grams. Perhaps the most important thing is that diamond prices spike with increased carat weight. Hence, as you investigate, do not dwell too much on carat because there is not much to it other than a metric.
Instead, focus on clarity and cut. Is the diamond rated 'flawless' or 'included'? It can be flawlessly clear with no external blemishes or have a level of imperfections. Diamonds are usually polished to remove such flaws and discoloration, so you should be highly vigilant to be able to notice them.
Diamonds come in different shapes. Whether round, princess, cushion, or oval, we recommend you zoom in on the artistry. A professionally cut diamond should have perfectly angled facets on the crown and around the pavilion area—the two diamond surfaces positioned above and below the girdle/parameter of the diamond. When done right, they give the stone excellent symmetry and brilliance and refract light to exude fire, sparkle, and luster.
That is a wrap on quality. You are now 4Cs-educated, and it is time to read the diamond certification report.