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Oval|Lab Grown|IGI

3.12ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG754594331

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG754594331

Diamond specifications and retailer prices

From £665 GBP
$885 USD
As of October 29, 2026
Save £6,003 GBP (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,668 GBP at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 3.12ct lab-grown oval diamond

This 3.12ct lab-grown oval 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 LG754594331 or 754594331. Listed at 20 retailers as of October 29, 2026, with prices from £665 to £6,668, a £6,003 spread on the same certified stone. Blue Nile lists it at £6,668. 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 angle36.6°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594331
Dimensions11.43 × 11.43 × 8.13 mm
L/W Ratio1.00
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
11.43 mm11.43 mm3.12 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594331
Side View
Table 58.0%Crown 36.6°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 63.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £6,345 GBP|Low: £665 GBP|High: £7,765 GBP|Avg: £2,399 GBP|-18.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
October 30, 2026
Retailer 13£665 GBP
Retailer 2£728 GBP
Retailer 15£916 GBP
Retailer 8£946 GBP
Retailer 11£1,016 GBP
Retailer 17£1,238 GBP
Retailer 6£1,433 GBP
Retailer 18£1,596 GBP
Retailer 12£1,756 GBP
Retailer 4£1,785 GBP
Retailer 5£1,922 GBP
Retailer 7£2,037 GBP
Retailer 16£2,213 GBP
Retailer 3£2,907 GBP
Retailer 9£4,096 GBP
Retailer 10£5,600 GBP
Retailer 14£5,902 GBP
Retailer 1£6,345 GBP

37 data points across 18 retailers

20 retailers£665 GBP to £6,668 GBP

A
Cheapest Retailer
-
£665 GBP
$885 USD
A
Retailer 2
-
£728 GBP
$969 USD
View
A
Retailer 3
-
£880 GBP
$1,172 USD
View
Final sale: no returns
A
Retailer 4
-
£916 GBP
$1,220 USD
View
A
Retailer 5
-
£946 GBP
$1,260 USD
View
A
Retailer 6
-
£1,016 GBP
View
A
Retailer 7
-
£1,238 GBP
$1,648 USD
View
A
Retailer 8
-
£1,433 GBP
€1,818 EUR
View
A
Retailer 9
-
£1,596 GBP
$2,125 USD
View
A
Retailer 10
-
£1,756 GBP
$2,338 USD
View
A
Retailer 11
-
£1,785 GBP
$2,377 USD
View
A
Retailer 12
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£1,922 GBP
A$3,938 AUD
View
Retailer 13
-
£2,037 GBP
A$4,174 AUD
View
Price last confirmed 8 days ago
A
Retailer 14
-
£2,213 GBP
$2,947 USD
View
B+
Retailer 15
-
£2,907 GBP
View
Retailer 16
-
£4,096 GBP
$5,455 USD
View
Price last confirmed 11 days ago
Retailer 17
-
£5,600 GBP
A$11,473 AUD
View
Price last confirmed 21 days ago
B
Retailer 18
-
£5,902 GBP
$7,860 USD
View
B
Retailer 19
-
£6,345 GBP
$8,450 USD
View
Most Expensive
B
Blue Nile
28013553 · Oct 29
£6,668 GBP
$8,879 USD
View
19 more retailers have this diamond
Prices start from £665 GBPSave up to £6,003 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 Oval
£665 GBP