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Round|Lab Grown|IGI

1.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG786640066

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786640066

Diamond specifications and retailer prices

From £320 GBP
$429 USD
As of October 29, 2026
Save £1,523 GBP (83%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £2,381 GBP at Brilliant Earth · As of October 16, 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 LG786640066 or 786640066. Listed at 26 retailers as of October 29, 2026, with a 476% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle33.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786640066
Dimensions7.42 × 7.46 × 4.46 mm
L/W Ratio1.01
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
7.42 mm7.46 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786640066
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.9%

Caratlytics Score

How it works →
A+
Exceptional
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: £1,843 GBP|Low: £320 GBP|High: £2,388 GBP|Avg: £861 GBP|-22.8%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 1, 2026
Retailer 3£320 GBP
Retailer 17£358 GBP
Retailer 22£359 GBP
Retailer 7£397 GBP
Retailer 8£397 GBP
Retailer 21£439 GBP
Retailer 19£504 GBP
Retailer 9£534 GBP
Retailer 13£621 GBP
Retailer 6£632 GBP
Retailer 2£653 GBP
Retailer 18£683 GBP
Retailer 15£698 GBP
Retailer 5£746 GBP
Retailer 16£902 GBP
Retailer 11£1,263 GBP
Retailer 4£1,277 GBP
Retailer 14£1,301 GBP
Retailer 10£1,437 GBP
Retailer 20£1,461 GBP
Retailer 12£1,487 GBP
Brilliant Earth£1,843 GBP

35 data points across 22 retailers

26 retailers£320 GBP to £1,843 GBP

A+
Cheapest Retailer
-
£320 GBP
$429 USD
A
Retailer 2
-
£358 GBP
$480 USD
View
Final sale: no returns
A
Retailer 3
-
£359 GBP
$481 USD
View
A
Retailer 4
-
£397 GBP
$532 USD
View
A
Retailer 5
-
£397 GBP
$532 USD
View
A
Retailer 6
-
£439 GBP
HK$4,600 HKD
View
A
Retailer 7
-
£504 GBP
$675 USD
View
A
Retailer 8
-
£534 GBP
$715 USD
View
A
Retailer 9
-
£621 GBP
€793 EUR
View
A
Retailer 10
-
£632 GBP
$847 USD
View
A
Retailer 11
-
£653 GBP
View
A
Retailer 12
-
£683 GBP
ZAR 14,774 ZAR
View
A
Retailer 13
-
£698 GBP
A$1,438 AUD
View
A
Retailer 14
-
£746 GBP
$999 USD
View
B+
Retailer 15
-
£902 GBP
$1,208 USD
View
B+
Retailer 16
-
£958 GBP
$1,284 USD
View
B+
Retailer 17
-
£1,263 GBP
SGD 2,287 SGD
View
B+
Retailer 18
-
£1,277 GBP
$1,711 USD
View
B+
Retailer 19
-
£1,301 GBP
$1,743 USD
View
B+
Retailer 20
-
£1,324 GBP
$1,774 USD
View
B+
Retailer 21
-
£1,387 GBP
$1,859 USD
View
B+
Retailer 22
-
£1,437 GBP
$1,925 USD
View
B+
Retailer 23
-
£1,461 GBP
View
B+
Retailer 24
-
£1,487 GBP
$1,992 USD
View
B
Retailer 25
-
£1,843 GBP
$2,470 USD
View
Most Expensive
Brilliant Earth
18904921A · Oct 16
£2,381 GBP
$3,190 USD
View
Price last confirmed 15 days ago
25 more retailers have this diamond
Prices start from £320 GBPSave up to £1,523 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
£320 GBP