Question 1

How much is a 3 carat oval lab grown diamond?

Accepted Answer

The price of a 3 carat oval lab grown diamond depends on its cut, color, clarity and certificate. In our stock, it costs about one and a half times a 2 carat of the same grade, and two to three times a 1 carat. A G color VS1 stone costs more than an I color SI1 of the same weight.

We hold more than 3,500 certified oval lab grown diamonds at 3.00–3.09 carats, so most grade-and-budget combinations are covered. Our price match covers certified loose diamonds too: find the same certified stone cheaper elsewhere and we match it for 48 hours. See today's prices →

Question 2

How much is a 3 carat oval diamond engagement ring?

Accepted Answer

A 3 carat oval diamond engagement ring costs the setting plus the diamond. Settings are priced separately and change with the metal: platinum costs more than 14K gold. The diamond's price depends on its grade. Choose both in our ring builder to see your total before you buy.

Browse oval settings → · 3 carat ovals →

Question 3

How big is a 3 carat oval diamond?

Accepted Answer

A 3 carat oval lab grown diamond measures about 11.78 × 8.09 mm. In our current stock the length runs from 11.28 mm to 12.11 mm, because cutters shape ovals to different proportions. The median length-to-width ratio is 1.44. A longer ratio covers more of the finger and reads larger.

Typical sizes of the oval lab grown diamonds in our stock:

1 carat — about 8.28 × 5.58 mm
1.5 carat — about 9.18 × 6.44 mm
2 carat — about 10.34 × 7.06 mm
3 carat — about 11.78 × 8.09 mm
4 carat — about 12.82 × 8.99 mm
5 carat — about 14.43 × 9.55 mm

Question 4

Is a 3 carat oval engagement ring too big?

Accepted Answer

That depends on your hand and your taste. At about 8.09 mm across, a 3 carat oval covers roughly half the width of a size 6 finger, so it looks bold. On a size 7 or larger it reads more balanced. A thin band makes the stone look bigger; a wider band evens it out.

Question 5

What does a 3 carat oval diamond look like on the hand?

Accepted Answer

On the hand a 3 carat oval reads long rather than wide, because it measures about 11.78 mm top to bottom and 8.09 mm across. It covers roughly half the width of a size 6 finger. A longer length-to-width ratio spreads further along the finger and reads larger still.

Question 6

Is there a big difference between a 2 carat and 3 carat oval?

Accepted Answer

Yes, but less than the weight suggests. A 3 carat oval weighs 50% more than a 2 carat, and in our stock it measures about 11.78 × 8.09 mm against 10.34 × 7.06 mm. That is roughly 14% longer and about 30% more coverage from the top, not 50%.

Compare them yourself: 2 carat ovals → · 3 carat ovals →

Question 7

What is the best setting for a 3 carat oval diamond?

Accepted Answer

There is no single best setting — it depends on the look you want. A solitaire shows the whole stone. A hidden halo adds sparkle at the sides without hiding the oval. A three stone setting adds width. For a stone this large, six prongs or claw prongs hold it more securely than four.

Band width matters too: a thin band makes a 3 carat oval look larger, and a wider band balances it. Browse oval settings by style: solitaire · hidden halo · three stone

See three stone oval engagement rings, or all our oval engagement rings.

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