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Marquise|Lab Grown|IGI

3.09ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG784604230

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG784604230

Diamond specifications and retailer prices

From £2,780 GBP
$3,725 USD
As of October 31, 2026
Save £11,427 GBP (80%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £21,353 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784604230 or 784604230. Listed at 23 retailers as of October 30, 2026, with a 411% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784604230
Dimensions14.66 × 7.65 × 4.79 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
14.66 mm7.65 mm3.09 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784604230
Side View
Table 61.0%Crown 34.8°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £21,353 GBP|Low: £2,780 GBP|High: £25,211 GBP|Avg: £8,283 GBP|-15.3%
Do Amore Diamonds
Retailer 2
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Retailer 20
October 31, 2026
Retailer 19£2,780 GBP
Retailer 11£3,104 GBP
Retailer 16£3,253 GBP
Retailer 8£3,475 GBP
Retailer 5£3,600 GBP
Retailer 18£3,638 GBP
Retailer 17£4,685 GBP
Retailer 12£4,966 GBP
Retailer 20£5,157 GBP
Retailer 2£5,163 GBP
Retailer 10£5,607 GBP
Retailer 3£5,821 GBP
Retailer 14£6,184 GBP
Retailer 15£8,273 GBP
Retailer 13£9,227 GBP
Retailer 4£10,394 GBP
Retailer 6£12,602 GBP
Retailer 9£13,647 GBP
Retailer 7£14,207 GBP
Do Amore Diamonds£21,353 GBP

42 data points across 20 retailers

23 retailers£2,780 GBP to £14,207 GBP

A
Cheapest Retailer
-
£2,780 GBP
$3,725 USD
A
Retailer 2
-
£3,104 GBP
$4,159 USD
View
A
Retailer 3
-
£3,253 GBP
$4,358 USD
View
A
Retailer 4
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£3,475 GBP
$4,656 USD
View
Final sale: no returns
Retailer 5
-
£3,600 GBP
$4,824 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
£3,600 GBP
$4,824 USD
View
A
Retailer 7
-
£3,638 GBP
$4,875 USD
View
A
Retailer 8
-
£4,685 GBP
$6,277 USD
View
B+
Retailer 9
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£4,966 GBP
$6,654 USD
View
B+
Retailer 10
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£5,157 GBP
$6,910 USD
View
B+
Retailer 11
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£5,163 GBP
View
B+
Retailer 12
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£5,607 GBP
View
B+
Retailer 13
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£5,821 GBP
$7,800 USD
View
B+
Retailer 14
-
£6,184 GBP
€7,891 EUR
View
B+
Retailer 15
-
£8,273 GBP
View
B+
Retailer 16
-
£9,227 GBP
ZAR 199,722 ZAR
View
B
Retailer 17
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£10,394 GBP
$13,927 USD
View
B
Retailer 18
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£10,879 GBP
$14,577 USD
View
B
Retailer 19
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£11,052 GBP
$14,808 USD
View
B
Retailer 20
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£12,602 GBP
$16,885 USD
View
B
Retailer 21
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£13,647 GBP
$18,285 USD
View
B
Retailer 22
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£14,207 GBP
$19,036 USD
View
Most Expensive
Do Amore Diamonds
27-A3903FB24 · Oct 31
£21,353 GBP
$28,610 USD
View
Price under review
22 more retailers have this diamond
Prices start from £2,780 GBPSave up to £11,427 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
3.09ct Marquise
£2,780 GBP