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Round|Lab Grown|IGI

1.29ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG841678729

Shape and cutting style on the report: Round brilliant

Certificate IGI LG841678729

Diamond specifications and retailer prices

From £197 GBP
$265 USD
As of November 1, 2026
Save £995 GBP (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,192 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 LG841678729 or 841678729. Listed at 16 retailers as of November 1, 2026, with prices from £197 to £1,192, a £995 spread on the same certified stone. Brilliant Earth lists it at £1,192. 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 angle33.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841678729
Dimensions6.97 × 7.02 × 4.27 mm
L/W Ratio1.01
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
6.97 mm7.02 mm1.29 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841678729
Side View
Table 58.0%Crown 33.9°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.1%

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: £1,192 GBP|Low: £197 GBP|High: £1,364 GBP|Avg: £622 GBP|-12.6%
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
Retailer 13
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Retailer 16
November 2, 2026
Retailer 3£197 GBP
Retailer 15£229 GBP
Retailer 16£367 GBP
Retailer 9£388 GBP
Retailer 4£407 GBP
Retailer 10£410 GBP
Retailer 12£426 GBP
Retailer 13£595 GBP
Retailer 6£612 GBP
Retailer 5£751 GBP
Retailer 7£786 GBP
Retailer 11£884 GBP
Retailer 8£923 GBP
Retailer 2£980 GBP
Retailer 14£1,002 GBP
Brilliant Earth£1,192 GBP

13 data points across 16 retailers

16 retailers£197 GBP to £1,192 GBP

A
Cheapest Retailer
-
£197 GBP
$265 USD
A
Retailer 2
-
£229 GBP
$307 USD
View
A
Retailer 3
-
£367 GBP
$492 USD
View
A
Retailer 4
-
£388 GBP
View
A
Retailer 5
-
£407 GBP
$546 USD
View
A
Retailer 6
-
£410 GBP
$550 USD
View
A
Retailer 7
-
£426 GBP
€545 EUR
View
A
Retailer 8
-
£595 GBP
A$1,229 AUD
View
B+
Retailer 9
-
£612 GBP
$821 USD
View
B+
Retailer 10
-
£751 GBP
$1,008 USD
View
B+
Retailer 11
-
£786 GBP
$1,055 USD
View
B+
Retailer 12
-
£884 GBP
A$1,826 AUD
View
B+
Retailer 13
-
£923 GBP
$1,238 USD
View
B+
Retailer 14
-
£980 GBP
View
B
Retailer 15
-
£1,002 GBP
$1,345 USD
View
Most Expensive
B+
Brilliant Earth
22208645A · Nov 2
£1,192 GBP
$1,600 USD
View
15 more retailers have this diamond
Prices start from £197 GBPSave up to £995 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
£197 GBP