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Round|Lab Grown|IGI

1.29ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG842605479

Shape and cutting style on the report: Round brilliant

Certificate IGI LG842605479

Diamond specifications and retailer prices

From £279 GBP
$374 USD
As of November 1, 2026
Save £1,025 GBP (79%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,304 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.29ct lab-grown round diamond

This 1.29ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG842605479 or 842605479. Listed at 16 retailers as of November 1, 2026, with prices from £279 to £1,304, a £1,025 spread on the same certified stone. Brilliant Earth lists it at £1,304. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842605479
Dimensions6.96 × 6.99 × 4.30 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
6.96 mm6.99 mm1.29 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842605479
Side View
Table 58.0%Crown 34.7°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.5%

Caratlytics Score

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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: Nov 1
Current: £1,304 GBP|Low: £279 GBP|High: £1,960 GBP|Avg: £707 GBP|-19.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 3, 2026
Retailer 3£279 GBP
Retailer 14£309 GBP
Retailer 8£343 GBP
Retailer 4£416 GBP
Retailer 7£417 GBP
Retailer 11£491 GBP
Retailer 10£501 GBP
Retailer 12£533 GBP
Retailer 9£548 GBP
Retailer 16£751 GBP
Retailer 15£907 GBP
Retailer 6£988 GBP
Retailer 2£994 GBP
Retailer 5£1,036 GBP
Retailer 13£1,240 GBP
Brilliant Earth£1,304 GBP

22 data points across 16 retailers

16 retailers£279 GBP to £1,304 GBP

A+
Cheapest Retailer
-
£279 GBP
$374 USD
Final sale: no returns
A
Retailer 2
-
£309 GBP
$415 USD
View
A
Retailer 3
-
£343 GBP
HK$3,600 HKD
View
A
Retailer 4
-
£416 GBP
$558 USD
View
A
Retailer 5
-
£417 GBP
$560 USD
View
A
Retailer 6
-
£491 GBP
View
A
Retailer 7
-
£501 GBP
€640 EUR
View
A
Retailer 8
-
£533 GBP
ZAR 11,562 ZAR
View
A
Retailer 9
-
£548 GBP
View
B+
Retailer 10
-
£751 GBP
A$1,551 AUD
View
B+
Retailer 11
-
£907 GBP
$1,217 USD
View
B+
Retailer 12
-
£988 GBP
SGD 1,792 SGD
View
B+
Retailer 13
-
£994 GBP
$1,334 USD
View
B+
Retailer 14
-
£1,036 GBP
$1,390 USD
View
B+
Retailer 15
-
£1,240 GBP
View
Most Expensive
B
Brilliant Earth
21710952A · Nov 2
£1,304 GBP
$1,750 USD
View
15 more retailers have this diamond
Prices start from £279 GBPSave up to £1,025 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+
1.29ct Round
£279 GBP