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Round|Lab Grown|IGI

1.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG844621712

Shape and cutting style on the report: Round brilliant

Certificate IGI LG844621712

Diamond specifications and retailer prices

From £368 GBP
$493 USD
As of October 29, 2026
Save £2,132 GBP (85%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £2,500 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 LG844621712 or 844621712. Listed at 23 retailers as of October 29, 2026, with prices from £368 to £2,500, a £2,132 spread on the same certified stone. Brilliant Earth lists it at £2,500. 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 angle34.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844621712
Dimensions7.38 × 7.44 × 4.51 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
7.38 mm7.44 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844621712
Side View
Table 59.0%Crown 34.3°Girdle: MediumPavilion 41°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,500 GBP|Low: £368 GBP|High: £2,500 GBP|Avg: £1,033 GBP
Brilliant Earth
Retailer 2
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Retailer 23
November 1, 2026
Retailer 22£368 GBP
Retailer 20£412 GBP
Retailer 8£456 GBP
Retailer 10£456 GBP
Retailer 9£469 GBP
Retailer 13£560 GBP
Retailer 7£617 GBP
Retailer 17£667 GBP
Retailer 15£728 GBP
Retailer 11£736 GBP
Retailer 2£756 GBP
Retailer 5£762 GBP
Retailer 18£784 GBP
Retailer 6£1,012 GBP
Retailer 4£1,200 GBP
Retailer 16£1,419 GBP
Retailer 12£1,487 GBP
Retailer 21£1,531 GBP
Retailer 3£1,589 GBP
Retailer 19£1,907 GBP
Retailer 14£1,992 GBP
Retailer 23£2,123 GBP
Brilliant Earth£2,500 GBP

20 data points across 23 retailers

23 retailers£368 GBP to £2,500 GBP

A
Cheapest Retailer
-
£368 GBP
$493 USD
A
Retailer 2
-
£412 GBP
$552 USD
View
Retailer 3
-
£456 GBP
$611 USD
View
Price last confirmed 15 days ago
A
Retailer 4
-
£456 GBP
$611 USD
View
A
Retailer 5
-
£469 GBP
$629 USD
View
Final sale: no returns
A
Retailer 6
-
£560 GBP
$750 USD
View
A
Retailer 7
-
£617 GBP
$827 USD
View
A
Retailer 8
-
£667 GBP
€851 EUR
View
A
Retailer 9
-
£728 GBP
$975 USD
View
B+
Retailer 10
-
£736 GBP
$986 USD
View
B+
Retailer 11
-
£756 GBP
View
B+
Retailer 12
-
£762 GBP
$1,021 USD
View
B+
Retailer 13
-
£784 GBP
ZAR 16,971 ZAR
View
B+
Retailer 14
-
£1,012 GBP
$1,355 USD
View
B+
Retailer 15
-
£1,200 GBP
$1,608 USD
View
B
Retailer 16
-
£1,419 GBP
$1,901 USD
View
B
Retailer 17
-
£1,487 GBP
$1,992 USD
View
B
Retailer 18
-
£1,531 GBP
CA$2,849 CAD
View
B
Retailer 19
-
£1,589 GBP
$2,129 USD
View
B
Retailer 20
-
£1,907 GBP
View
B
Retailer 21
-
£1,992 GBP
$2,669 USD
View
B
Retailer 22
-
£2,123 GBP
$2,845 USD
View
Most Expensive
B
Brilliant Earth
22269301A · Oct 31
£2,500 GBP
$3,350 USD
View
22 more retailers have this diamond
Prices start from £368 GBPSave up to £2,132 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
£368 GBP