CaratHunter
Plans
Round|Lab Grown|IGI

5.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG787621675

Shape and cutting style on the report: Round brilliant

Certificate IGI LG787621675

Diamond specifications and retailer prices

From £6,289 GBP
$8,426 USD
As of November 1, 2026
Save £22,437 GBP (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £28,725 GBP at With Clarity · As of October 31, 2026
View at With Clarity

About this 5.51ct lab-grown round diamond

This 5.51ct lab-grown round sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG787621675 or 787621675. Listed at 12 retailers as of October 31, 2026, with prices from £6,289 to £28,725, a £22,437 spread on the same certified stone. With Clarity lists it at £28,725. 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

5.51
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787621675
Dimensions11.31 × 11.38 × 7.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
HEARTS & ARROWS 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
11.31 mm11.38 mm5.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787621675
Side View
Table 56.0%Crown 34.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.8%

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: £8,498 GBP|Low: £6,188 GBP|High: £28,754 GBP|Avg: £14,043 GBP|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
November 1, 2026
Retailer 7£6,289 GBP
Retailer 3£7,042 GBP
Retailer 10£7,405 GBP
Retailer 8£7,700 GBP
Retailer 1£8,498 GBP
Retailer 11£8,860 GBP
Retailer 4£11,830 GBP
Retailer 6£13,217 GBP
Retailer 5£17,613 GBP
Retailer 2£19,867 GBP
Retailer 9£22,836 GBP
With Clarity£28,754 GBP

41 data points across 12 retailers

12 retailers£6,289 GBP to £28,725 GBP

A
Cheapest Retailer
-
£6,289 GBP
$8,426 USD
Retailer 2
-
£7,042 GBP
$9,435 USD
View
Price last confirmed 76 days ago
A
Retailer 3
-
£7,405 GBP
$9,922 USD
View
A
Retailer 4
-
£7,700 GBP
HK$80,600 HKD
View
A
Retailer 5
-
£8,498 GBP
View
A
Retailer 6
-
£8,860 GBP
$11,871 USD
View
A
Retailer 7
-
£11,830 GBP
€15,096 EUR
View
B+
Retailer 8
-
£13,217 GBP
View
B+
Retailer 9
-
£17,613 GBP
$23,600 USD
View
Retailer 10
-
£19,867 GBP
$26,620 USD
View
Price last confirmed 33 days ago
B
Retailer 11
-
£22,836 GBP
$30,598 USD
View
Most Expensive
B
With Clarity
787621675 · Oct 31
£28,725 GBP
$38,489 USD
View
11 more retailers have this diamond
Prices start from £6,289 GBPSave up to £22,437 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
5.51ct Round
£6,289 GBP