Modern women all over the world admire the sleek and clean look of emerald diamonds. These elegant beauties are cut in a unique manner known as step cut featuring long narrow facets and a large table. While less fiery than the brilliant cut, the long lines and dramatic half-of-mirrors effect of emerald diamonds, give this cut an elegant look.
Emerald Diamond Cut Guide
The emerald cut is one of the oldest diamond shapes with origins tracing back to the 1500s. Cutters originally created this shape for emerald gemstones. However, diamond cutters took notice of this shape as it reduces the pressure during the cutting process and therefore prevents chips.
As for all diamond shapes cut is the crucial factor in maximizing the beauty of the stone. To make sure you understand the ideal cut specifications use the table below as a general guideline for evaluating the cut of emerald diamonds.
|TABLE %||61 - 69||57 - 60 or 70 - 72||54 - 56 or 73 - 74||51 - 53 or 75 - 79||< 51 or > 79|
|DEPTH %||61 - 67||59 - 60.9 or 67.1 - 70||57 - 58.9 or 70.1 - 74||54 - 56.9 or 74.1 - 79||< 54 or > 79|
|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|
Emerald Diamond Ratio Guide
Length to width ratio of emerald diamonds varies from nearly square to narrow rectangular. The classic emerald cut diamond has a ratio of around 1.50.
The chart below serves as a guideline for evaluating the ratio of emerald-cut diamonds.
|SQUARE||1.00 - 1.03||1.00 - 1.03||1.04 - 1.05||1.06 - 1.08||> 1.08|
|RECTANGLE||1.40 - 1.50||1.30 - 1.39 or 1.51 - 1.60||1.20 - 1.29 or 1.61 - 1.80||1.15 - 1.19 or 1.81 - 1.90||< 1.15 or > 1.90|
Emerald Diamond Colour Guide
In general, emerald cut diamonds (especially 1.50 carats and over) reveal colour easier compared to all other diamond shapes because of their large and open facets. Besides, step cut diamonds do not hide colour as much as brilliant cuts.
However, smaller emerald diamonds hide colour better than larger stones, that’s why you may not need to buy a colourless (D-F) diamond even if you want your stone to appear white.
The chart below provides a general guideline for evaluating colour in emerald-cut diamonds.
|< .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||> I|
|> 2.0 ct.||D - F||D - F||G||H - I||> I|
Emerald Diamond Clarity Guide
As a rule, inclusions are easier to see in emerald-cut diamonds. For example, while SI1 clarity might be a great balance of price and appearance for other diamond shapes, in emerald cut diamonds the perfect choice will be VS2.
The chart below provides general information for evaluating clarity in emerald-cut diamonds.
|< .50 ct.||FL - VS2||SI1||SI2||I1||> I1|
|.51-1.0 ct.||FL - VS1||VS2||SI1||SI2||> SI2|
|1.0-2.0 ct.||FL - VVS2||VS1 - VS2||SI1||SI2||> SI2|
|> 2.0 ct.||FL - VVS2||VS1||VS2||SI1||> SI1|
Cover image credit: Sotheby’s