CaratHunter
Plans
Round|Lab Grown|IGI

2.51ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG847635118

Shape and cutting style on the report: Round brilliant

Certificate IGI LG847635118

Diamond specifications and retailer prices

From £639 GBP
HK$6,700 HKD
As of November 1, 2026
Save £3,996 GBP (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,635 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG847635118 or 847635118. Listed at 14 retailers as of November 1, 2026, with prices from £639 to £4,635, a £3,996 spread on the same certified stone. Brilliant Earth lists it at £4,635. 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

2.51
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847635118
Dimensions8.76 × 8.79 × 5.29 mm
L/W Ratio1.00
Girdle conditionFaceted
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
8.76 mm8.79 mm2.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG847635118
Side View
Table 58.0%Crown 33°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £4,635 GBP|Low: £639 GBP|High: £5,216 GBP|Avg: £1,427 GBP|-11.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 3£639 GBP
Retailer 2£708 GBP
Retailer 4£790 GBP
Retailer 10£790 GBP
Retailer 7£874 GBP
Retailer 13£897 GBP
Retailer 11£1,315 GBP
Retailer 12£1,414 GBP
Retailer 14£1,429 GBP
Retailer 6£1,800 GBP
Retailer 5£1,859 GBP
Retailer 8£2,333 GBP
Retailer 9£3,771 GBP
Brilliant Earth£4,635 GBP

12 data points across 14 retailers

14 retailers£639 GBP to £4,635 GBP

A
Cheapest Retailer
-
£639 GBP
HK$6,700 HKD
A
Retailer 2
-
£708 GBP
View
A
Retailer 3
-
£790 GBP
$1,060 USD
View
A
Retailer 4
-
£790 GBP
$1,060 USD
View
A
Retailer 5
-
£874 GBP
View
A
Retailer 6
-
£897 GBP
€1,147 EUR
View
B+
Retailer 7
-
£1,315 GBP
A$2,714 AUD
View
B+
Retailer 8
-
£1,414 GBP
$1,898 USD
View
B+
Retailer 9
-
£1,429 GBP
ZAR 30,970 ZAR
View
B+
Retailer 10
-
£1,800 GBP
$2,416 USD
View
B+
Retailer 11
-
£1,859 GBP
SGD 3,371 SGD
View
B+
Retailer 12
-
£2,333 GBP
View
B
Retailer 13
-
£3,771 GBP
$5,060 USD
View
Most Expensive
B
Brilliant Earth
22230090A · Nov 2
£4,635 GBP
$6,220 USD
View
13 more retailers have this diamond
Prices start from £639 GBPSave up to £3,996 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
2.51ct Round
£639 GBP