A major part of the cost of a diamond depends upon the 4 C’s of the diamond. According to the clarity grading scale used by GIA, the top grade is the FL (Flawless) while the bottom grade is I (Included). The cost decreases from top grade to bottom grade; however, it is better to consider up to the SI (Slightly Included) grade while buying heart diamond engagement ring.
In terms of color, the highest grade is D and the lowest is Z. You must not choose a grade below G or H, as they may contain yellow tints in them and make the stone look gloomy and unattractive. When it comes to carat, the bigger the carat is, the more expensive the stone becomes; hence, choose one according to your budget.
The final aspect is the cut of the diamond, which determines how much brilliance the stone will have. The finer the cut, the more brilliance and sparkle the heart cut diamond will have, and the higher the price will go. Consider the factors like the length to width ratio, girdle, table width, and depth of the diamond, to assess the value of the diamond.