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Round|Lab Grown|IGI

1.29ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG818644617

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644617

Diamond specifications and retailer prices

From £215 GBP
$289 USD
As of November 1, 2026
Save £1,535 GBP (88%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,751 GBP at Queensmith · As of October 27, 2026
View at Queensmith

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 LG818644617 or 818644617. Listed at 24 retailers as of October 27, 2026, with prices from £215 to £1,751, a £1,535 spread on the same certified stone. Queensmith lists it at £1,751. 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 angle33.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644617
Dimensions6.99 × 7.04 × 4.23 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
6.99 mm7.04 mm1.29 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644617
Side View
Table 59.0%Crown 33.3°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.2%

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: Nov 1
Current: £471 GBP|Low: £215 GBP|High: £1,364 GBP|Avg: £573 GBP|+3.0%
Retailer 1
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
November 3, 2026
Retailer 3£215 GBP
Retailer 4£241 GBP
Retailer 6£267 GBP
Retailer 5£359 GBP
Retailer 13£384 GBP
Retailer 9£424 GBP
Retailer 8£431 GBP
Retailer 10£460 GBP
Retailer 1£471 GBP
Retailer 12£651 GBP
Retailer 7£692 GBP
Retailer 2£1,013 GBP
Retailer 14£1,071 GBP
Retailer 11£1,192 GBP

34 data points across 14 retailers

24 retailers£215 GBP to £1,751 GBP

A
Cheapest Retailer
-
£215 GBP
$289 USD
A
Retailer 2
-
£241 GBP
$323 USD
View
Final sale: no returns
A
Retailer 3
-
£250 GBP
$335 USD
View
A
Retailer 4
-
£267 GBP
$358 USD
View
Retailer 5
-
£267 GBP
$358 USD
View
Price last confirmed 9 days ago
A
Retailer 6
-
£296 GBP
HK$3,100 HKD
View
A
Retailer 7
-
£359 GBP
$482 USD
View
A
Retailer 8
-
£384 GBP
$515 USD
View
A
Retailer 9
-
£424 GBP
View
A
Retailer 10
-
£431 GBP
€551 EUR
View
A
Retailer 11
-
£460 GBP
ZAR 9,982 ZAR
View
A
Retailer 12
-
£471 GBP
View
A
Retailer 13
-
£601 GBP
$807 USD
View
B+
Retailer 14
-
£651 GBP
A$1,345 AUD
View
B+
Retailer 15
-
£692 GBP
$929 USD
View
B+
Retailer 16
-
£858 GBP
SGD 1,556 SGD
View
B+
Retailer 17
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£858 GBP
$1,152 USD
View
B+
Retailer 18
-
£895 GBP
$1,201 USD
View
B+
Retailer 19
-
£951 GBP
$1,276 USD
View
B+
Retailer 20
-
£1,013 GBP
$1,360 USD
View
Retailer 21
-
£1,071 GBP
View
Price last confirmed 7 days ago
B
Retailer 22
-
£1,101 GBP
$1,477 USD
View
B+
Retailer 23
-
£1,192 GBP
$1,600 USD
View
Most Expensive
B
Queensmith
LG818644617 · Oct 27
£1,751 GBP
View
23 more retailers have this diamond
Prices start from £215 GBPSave up to £1,535 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
£215 GBP