Which looks bigger, the 4 ct oval or the 2 ct marquise?

The 4 ct oval is roughly twice the carat weight and will look clearly larger. The marquise's elongated shape makes its 2 ct read bigger than a round of the same weight, but not close to 4 ct.

Is the marquise worth about $356 more?

Only if color and clarity matter more to you than size. The marquise is EF/VS versus G-H/VS-SI, a real step up in grade, but you give up half the carat weight for that premium.

Which is better for everyday wear?

The oval's lower, rounded outline snags less than the marquise's pointed ends. Either way, a 2 mm band and prong setting need periodic tightening, and the marquise needs its points checked.

Which holds up better over time?

Both are lab-grown diamonds, so both are as hard as mined diamond and resist scratching. The marquise's points are the fragile part; the oval has no sharp tips.

Can I get the oval in white or rose gold?

Yes. The oval comes in 14k white, yellow or rose gold. The marquise is listed in 14k yellow gold only.

Which is the better value per carat?

The oval, by a wide margin. At $1,393.92 for 4 ct it is about $348 per carat; the marquise at $1,749.99 for 2 ct is about $875 per carat.

4Ct Oval Solitaire Lab Grown Diamond Ring vs Marquise Lab Grown Diamond 2ct Solitaire Ring

Buy the 4 ct oval from Bliss Diamond if you want maximum size for the money: it is $1,393.92 as of November 5, 2026, versus $1,749.99 at Amazon for the 2 ct marquise. The marquise wins on color and clarity (EF/VS versus G-H/VS-SI) and has a more distinctive shape, but you pay about $356 more for half the carat weight. Choose the oval for value and presence, the marquise for a sharper, more colorless stone.

Today the 4Ct Oval Solitaire Lab Grown Diamond Ring costs $356.07 less at its best price.

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