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Marquise|Lab Grown|IGI

3.12ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG839684893

Shape and cutting style on the report: Hexagonal modified brilliant

Certificate IGI LG839684893

Diamond specifications and retailer prices

From £1,982 GBP
$2,655 USD
As of November 1, 2026
Save £8,572 GBP (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £10,553 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown marquise diamond

This 3.12ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG839684893 or 839684893. Listed at 8 retailers as of October 31, 2026, with prices from £1,982 to £10,553, a £8,572 spread on the same certified stone. Do Amore Diamonds lists it at £10,553. 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

3.12
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839684893
Dimensions13.89 × 7.19 × 4.68 mm
L/W Ratio1.93
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
13.89 mm7.19 mm3.12 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839684893
Side View
Table 62.0%Crown 35.4°Girdle: MED-STKPavilion 35.5°Culet: NoneDepth 65.1%

Caratlytics Score

How it works →
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: Nov 1
Current: £10,553 GBP|Low: £1,982 GBP|High: £10,553 GBP|Avg: £4,769 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£1,982 GBP
Retailer 4£2,090 GBP
Retailer 8£3,105 GBP
Retailer 7£5,758 GBP
Retailer 2£5,817 GBP
Retailer 3£6,605 GBP
Retailer 5£7,581 GBP
Do Amore Diamonds£10,553 GBP

9 data points across 8 retailers

8 retailers£1,982 GBP to £10,553 GBP

A
Cheapest Retailer
-
£1,982 GBP
$2,655 USD
Final sale: no returns
A
Retailer 2
-
£2,090 GBP
$2,800 USD
View
A
Retailer 3
-
£3,105 GBP
$4,160 USD
View
B+
Retailer 4
-
£5,758 GBP
$7,715 USD
View
B+
Retailer 5
-
£5,817 GBP
View
B+
Retailer 6
-
£6,605 GBP
View
B
Retailer 7
-
£7,581 GBP
$10,158 USD
View
Most Expensive
B
Do Amore Diamonds
20-E103545 · Oct 31
£10,553 GBP
$14,140 USD
View
7 more retailers have this diamond
Prices start from £1,982 GBPSave up to £8,572 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
3.12ct Marquise
£1,982 GBP