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Diamonds in stock

3.00–3.99 Carat Natural Marquise Diamonds

Natural marquise diamonds from 3.00–3.99 carats, GIA or IGI certified. Widen the filters on the left to see more.

In stock GIA & IGI certified 3.00–3.99 ct
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Shop by carat 1.00–1.49 ct · In stock 1.50–1.99 ct · In stock 2.00–2.49 ct · In stock 2.50–2.99 ct · In stock 3.00–3.99 ct · In stock 4.00–4.99 ct · In stock

GIA & IGI certified natural diamonds · Same-day shipping before 6 PM ET · No MOQ · Trade approval same business day before 4 PM ET

Marquise Available
GIA
3.01ct Marquise
E · SI2 · Medium Fluor
13.78 × 7.65 × 4.55
Polish
EX
Symmetry
VG
Ratio
1.80
Marquise Available
HRD
3.02ct Marquise
D · SI2 · None Fluor
15.28 × 7.47 × 4.36
Polish
EX
Symmetry
VG
Ratio
2.05
Marquise Available
GIA
3.02ct Marquise
D · I1 · None Fluor
15.28 × 7.47 × 4.35
Polish
EX
Symmetry
EX
Ratio
2.05
Marquise Available
GIA
3.01ct Marquise
F · SI2 · Medium Fluor
14.95 × 7.57 × 4.38
Polish
EX
Symmetry
VG
Ratio
1.97
Marquise Available
GIA
3.50ct Marquise
D · SI1 · None Fluor
17.05 × 7.68 × 4.45
Polish
EX
Symmetry
EX
Ratio
2.22
About 3.00–3.99 carat natural marquise diamonds

How big is a 3.00–3.99 carat natural marquise?

The natural marquise diamonds from 3.00–3.99 carats in stock face up at 13.8–17.1 × 7.5–7.7 mm, colors D–F, each GIA or IGI certified.

Diamond size chart (mm to carat) All natural marquise diamonds

3.00–3.99 carat natural diamonds in other shapes

3.00–3.99 ct natural oval 3.00–3.99 ct natural emerald cut 3.00–3.99 ct natural cushion 3.00–3.99 ct natural round 3.00–3.99 ct natural pear 3.00–3.99 ct natural radiant cut
Natural diamonds Antique cuts Natural melee Diamond size chart (mm to carat) Custom jewelry We also carry certified lab-grown diamonds →

Trade questions

Is every natural diamond certified?

Yes. Each natural diamond on this page has a GIA or IGI report. Open the diamond page for the report number and verify it on the lab’s website.

How fast do you ship?

Orders placed before 6 PM ET ship the same day. International delivery takes 3–4 business days.

Can you find a natural diamond that is not listed?

Yes. We source diamonds to your specification. Send the shape, size, color and clarity on WhatsApp.

How do I see prices?

Prices are for the trade. Sign in, or open a trade account: approval is the same business day if you apply before 4 PM ET.