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Round|Lab Grown|IGI

1.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG823695128

Shape and cutting style on the report: Round brilliant

Certificate IGI LG823695128

Diamond specifications and retailer prices

From £393 GBP
$527 USD
As of October 30, 2026
Save £3,241 GBP (89%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £3,635 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 LG823695128 or 823695128. Listed at 23 retailers as of October 30, 2026, with prices from £393 to £3,635, a £3,241 spread on the same certified stone. Brilliant Earth lists it at £3,635. 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 angle34.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823695128
Dimensions7.34 × 7.37 × 4.51 mm
L/W Ratio1.00
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
7.34 mm7.37 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823695128
Side View
Table 57.0%Crown 34.7°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.4%

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 30
Current: £3,635 GBP|Low: £351 GBP|High: £3,642 GBP|Avg: £1,454 GBP|-0.2%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 22
November 1, 2026
Retailer 21£393 GBP
Retailer 4£610 GBP
Retailer 2£640 GBP
Retailer 11£716 GBP
Retailer 18£743 GBP
Retailer 8£855 GBP
Retailer 9£860 GBP
Retailer 19£873 GBP
Retailer 13£1,016 GBP
Retailer 16£1,137 GBP
Retailer 17£1,179 GBP
Retailer 5£1,193 GBP
Retailer 3£1,365 GBP
Retailer 6£1,707 GBP
Retailer 15£1,952 GBP
Retailer 20£2,087 GBP
Retailer 14£2,199 GBP
Retailer 7£2,457 GBP
Retailer 12£2,496 GBP
Retailer 10£2,575 GBP
Retailer 22£2,798 GBP
Brilliant Earth£3,635 GBP

22 data points across 22 retailers

23 retailers£393 GBP to £3,635 GBP

A
Cheapest Retailer
-
£393 GBP
$527 USD
A
Retailer 2
-
£610 GBP
$818 USD
View
A
Retailer 3
-
£640 GBP
$858 USD
View
A
Retailer 4
-
£716 GBP
$960 USD
View
Final sale: no returns
B+
Retailer 5
-
£743 GBP
$995 USD
View
Retailer 6
-
£758 GBP
$1,016 USD
View
Price last confirmed 15 days ago
B+
Retailer 7
-
£855 GBP
$1,145 USD
View
B+
Retailer 8
-
£860 GBP
HK$9,000 HKD
View
B+
Retailer 9
-
£873 GBP
$1,170 USD
View
B+
Retailer 10
-
£1,016 GBP
View
B+
Retailer 11
-
£1,137 GBP
View
B+
Retailer 12
-
£1,179 GBP
€1,505 EUR
View
B+
Retailer 13
-
£1,193 GBP
$1,599 USD
View
B+
Retailer 14
-
£1,365 GBP
ZAR 29,541 ZAR
View
B
Retailer 15
-
£1,707 GBP
$2,287 USD
View
Retailer 16
-
£1,952 GBP
$2,615 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
£2,087 GBP
$2,797 USD
View
B
Retailer 18
-
£2,199 GBP
$2,947 USD
View
B
Retailer 19
-
£2,457 GBP
$3,292 USD
View
B
Retailer 20
-
£2,496 GBP
SGD 4,519 SGD
View
B
Retailer 21
-
£2,575 GBP
$3,450 USD
View
B
Retailer 22
-
£2,798 GBP
View
Most Expensive
B
Brilliant Earth
21547131A · Oct 31
£3,635 GBP
$4,870 USD
View
22 more retailers have this diamond
Prices start from £393 GBPSave up to £3,241 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
£393 GBP