Heart-shaped diamonds are probably the most romantic and unique stones today. They are very popular in solitaire pendants as well as engagement rings. When choosing a heart-shaped diamond the most important characteristic is symmetry, since two halves of the stone must be identical. The cleft should be sharp and distinct, and the wings should have very slightly rounded shape.
Heart-Shaped Diamond Cut Guide
Heart-shaped diamonds come in a variety of cuts, from narrow to fat. The choice of a certain cut should be dictated by personal preference, however, the classic heart-shaped diamond ratio is approximately 1.00. For hearts that are to be set in pendants, the best choice may be slightly narrow cut with a ratio of 1.05 – 1.15. While for hearts set in a solitaire ring a slightly wider cut (0.85 – 1.00) is more preferable.
The table below serves as a general guideline for evaluating the cut of a heart-shaped diamond.
|TABLE %||53 - 63||52 or 64 - 65||51 or 66 - 68||50 or 69 - 70||< 50 or > 70|
|DEPTH %||58 - 62||56 - 57.9 or 62.1 - 66||53 - 55.9 or 66.1 - 71||50 - 52.9 or 71.1 - 74||< 50 or > 74|
|GIRDLE||Very Thin to Slightly Thick||Very Thin to Slightly Thick||Very Thin to Thick||Very Thin to Very Thick||Extremely Thin to Extremely Thick|
|CULET||None||Very Small||Small||Medium||> Medium|
|LENGTH TO WIDTH RATIO||0.95 - 1.02||0.89 - 0.94 or 1.03 - 1.05||0.83 - 0.87 or 1.06 - 1.10||0.80 - 0.83 or 1.11 - 1.15||> .80 or < 1.15|
Heart-Shaped Diamond Colour Guide
Evaluating colour in the heart-shaped diamonds is quite subjective. Many buyers actually prefer slightly warmer diamonds of G-H grade over colourless stones of D-F grade.
Use the table below that provides a general guideline to evaluate the colour of a heart-shaped diamond.
|< .50 ct.||D - G||H - I||J - K||L - M||> M|
|.51-1.0 ct.||D - F||G||H - I||J - K||> K|
|1.0-2.0 ct.||D - F||D - F||G - H||I - J||> J|
|> 2.0 ct.||D - F||D -F||G||H - I||> I|
Heart-Shaped Diamond Clarity Guide
Evaluating clarity in the heart-shaped diamonds is subjective as well. It’s important to understand that each customer has a unique standard for clarity. Some are comfortable with inclusions as long as they are not eye seen, others prefer flawless stones.
The clarity chart below provides a general guideline for evaluating clarity in heart-shaped diamonds.
|< .50 ct.||FL - VS2||SI1 - SI2||I1||I2||> I2|
|.51-1.0 ct.||FL - VS1||VS2 - SI1||SI2||I1 - I2||> I2|
|1.0-2.0 ct.||FL - VVS2||VS1 - VS2||SI1 - SI2||I1||> I1|
|> 2.0 ct.||FL - VVS2||VS1 - VS2||SI1||SI2||> SI2|
Cover image credit: Graff