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Round|Lab Grown|IGI

1.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG803629717

Shape and cutting style on the report: Round brilliant

Certificate IGI LG803629717

Diamond specifications and retailer prices

From £490 GBP
$657 USD
As of October 29, 2026
Save £2,293 GBP (82%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £2,784 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG803629717 or 803629717. Listed at 24 retailers as of October 29, 2026, with prices from £490 to £2,784, a £2,293 spread on the same certified stone. Brilliant Earth lists it at £2,784. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803629717
Dimensions7.42 × 7.38 × 4.49 mm
L/W Ratio1.01
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
7.42 mm7.38 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG803629717
Side View
Table 58.0%Crown 33.8°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.7%

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: Oct 29
Current: £2,784 GBP|Low: £471 GBP|High: £3,627 GBP|Avg: £1,243 GBP|-23.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 16
Retailer 17
November 1, 2026
Retailer 17£490 GBP
Retailer 16£534 GBP
Retailer 4£569 GBP
Retailer 5£569 GBP
Retailer 2£778 GBP
Retailer 13£806 GBP
Retailer 8£813 GBP
Retailer 15£877 GBP
Retailer 10£906 GBP
Retailer 11£967 GBP
Retailer 14£1,036 GBP
Retailer 6£1,321 GBP
Retailer 3£1,599 GBP
Retailer 9£1,832 GBP
Retailer 7£1,959 GBP
Retailer 12£2,409 GBP
Brilliant Earth£2,784 GBP

32 data points across 17 retailers

24 retailers£490 GBP to £2,784 GBP

A
Cheapest Retailer
-
£490 GBP
$657 USD
A
Retailer 2
-
£534 GBP
$715 USD
View
A
Retailer 3
-
£549 GBP
$735 USD
View
Final sale: no returns
A
Retailer 4
-
£569 GBP
$762 USD
View
Retailer 5
-
£569 GBP
$762 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
£750 GBP
$1,005 USD
View
A
Retailer 7
-
£778 GBP
View
B+
Retailer 8
-
£803 GBP
$1,076 USD
View
B+
Retailer 9
-
£806 GBP
$1,080 USD
View
B+
Retailer 10
-
£813 GBP
$1,090 USD
View
B+
Retailer 11
-
£877 GBP
A$1,808 AUD
View
B+
Retailer 12
-
£906 GBP
View
B+
Retailer 13
-
£967 GBP
€1,234 EUR
View
Retailer 14
-
£1,036 GBP
ZAR 22,422 ZAR
View
Price last confirmed 8 days ago
B
Retailer 15
-
£1,321 GBP
$1,770 USD
View
B
Retailer 16
-
£1,599 GBP
$2,143 USD
View
B
Retailer 17
-
£1,832 GBP
$2,455 USD
View
B
Retailer 18
-
£1,914 GBP
SGD 3,466 SGD
View
B
Retailer 19
-
£1,940 GBP
$2,600 USD
View
Retailer 20
-
£1,959 GBP
$2,625 USD
View
Price last confirmed 18 days ago
B
Retailer 21
-
£1,962 GBP
$2,630 USD
View
B
Retailer 22
-
£1,979 GBP
$2,652 USD
View
B
Retailer 23
-
£2,409 GBP
View
Most Expensive
B
Brilliant Earth
20085656A · Oct 31
£2,784 GBP
$3,730 USD
View
23 more retailers have this diamond
Prices start from £490 GBPSave up to £2,293 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
1.51ct Round
£490 GBP