Oval diamonds combine the fire and brilliance of a round diamond with a shape that is more unique. Similar to other elongated shapes, oval diamonds can appear larger than their actual carat weight as a result of the long, thin appearance.
Oval stones vary in length to width ratio. While classic oval proportions call for a ratio between 1.35-1.51), oval proportions outside these length to width ratios can also be beautiful.
Some oval stones can exhibit a bowtie effect', where a bowtie shaped darkness is visible in the middle of the stone. HYSTR's GIA Gemologists can examine stones to help a buyer choose a diamond with little to no bowtie effect.
The following tables provide additional guidance for understanding the cut, color, and clarity of oval stones.
OVAL DIAMOND CUT GUIDE
| EXCELLENT | VERY GOOD | GOOD | FAIR / POOR | |
| Table % | 54 - 63 | 53.9 - 52 or 62.9 - 65 |
51.9 or 65.5 - 72 |
< 51 or > 68 |
| Depth % | 58 - 62 | 53 - 54.9 or 65.1 - 72 |
< 53 or > 72 |
|
| Length / Width Ratio | 1.37 - 1.50 | 1.3 - 1.369 or 1.501 - 1.56 |
1.299 - 1.24 or 1.561 - 1.62 |
> 1.24 or < 1.62 |
| Girdle | Very Thin - Slightly Thick | Very Thin to Thick | Very Thin to Very Thick or Ex. Thin to Ex. Thick | |
| Culet | None | Very Small | Small | > Medium |
OUR GIA GEMOLOGIST RECOMMENDS
The cut of an oval diamond will impact the sparkle and si/e appearance of the stone. Most diamond grading labs do not provide cut ratings, so use this table as a reference to determine how your stone will sparkle.
OVAL DIAMOND CLARITY GUIDE
| EXCELLENT | VERY GOOD | GOOD (Eye Clean) |
FAIR / POOR (Not Eye Clean) |
|
| < .50 Carats | FL - VS2 | VS2 - SI1 | SI2 | > I1 |
| .51 - 1.20 Carats | FL - VS1 | VS2 - SI1 | SI2 | > I1 |
| 1.21 - 2.00 Carats | FL - VS1 | VS2 - SI1 | SI2 | > I1 |
| > 2.00 Carats | FL - VVS2 | VS1 - VS2 | SI1 | > SI2 |
OUR GIA GEMOLOGIST RECOMMENDS
Oval diamonds are more forgiving of small clarity flaws. A diamond that is a lower clarity, but still 100% eye-clean, represents the best value.
Our gemologist recommends that clients purchase a stone with VS 2-SI 2 clarity. The inclusions in these stones will only be visible under magnification.
OVAL DIAMOND COLOR GUIDE
| EXCELLENT | VERY GOOD | GOOD (Looks White) |
FAIR / POOR (Color is Eye-Visible) |
|
| < .50 Carats | D - G | H - I | J | > J |
| .51 - 1.20 Carats | D - G | H - I | J | > J |
| 1.21 - 2.00 Carats | D - G | H - I | J | > J |
| > 2.00 Carats | D - F | G - H | I | > I |
| Fluorescence | None - Faint | Medium | Strong to Very Strong | |
OUR GIA GEMOLOGIST RECOMMENDS
Oval diamonds show less visible color than many other shapes. A diamond that is a lower color, but still appears white, represents the best value.
Our gemologist recommends that clients purchase a stone with H -1 color. The color in these stones will be difficult to detect with an untrained eye.
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