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Radiant|Lab Grown|IGI

1.29ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG782688903

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG782688903

Diamond specifications and retailer prices

From £349 GBP
As of November 4, 2026
Save £1,036 GBP (75%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,479 GBP at Rare Carat · As of August 9, 2026
View at Rare Carat

About this 1.29ct lab-grown radiant diamond

This 1.29ct lab-grown radiant 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 LG782688903 or 782688903. Listed at 13 retailers as of November 4, 2026, with a 297% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG782688903
Dimensions7.70 × 5.48 × 3.59 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizePointed
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
7.70 mm5.48 mm1.29 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG782688903
Side View
Table 62.0%Crown 40.9°Girdle: MED-STKPavilion 34.2°Culet: NoneDepth 65.5%

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 4
Current: £1,363 GBP|Low: £349 GBP|High: £2,052 GBP|Avg: £768 GBP|-1.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 4, 2026
Retailer 3£349 GBP
Retailer 7£389 GBP
Retailer 5£399 GBP
Retailer 2£424 GBP
Retailer 11£441 GBP
Retailer 12£495 GBP
Retailer 6£559 GBP
Retailer 13£851 GBP
Retailer 4£879 GBP
Retailer 8£903 GBP
Retailer 10£921 GBP
Rare Carat£1,363 GBP
Retailer 9£1,385 GBP

36 data points across 13 retailers

13 retailers£349 GBP to £1,385 GBP

A
Cheapest Retailer
-
£349 GBP
A
Retailer 2
-
£389 GBP
View
A
Retailer 3
-
£424 GBP
View
A
Retailer 4
-
£441 GBP
View
A
Retailer 5
-
£495 GBP
View
B+
Retailer 6
-
£559 GBP
View
B+
Retailer 7
-
£851 GBP
View
B+
Retailer 8
-
£879 GBP
View
B+
Retailer 9
-
£903 GBP
View
B+
Retailer 10
-
£921 GBP
View
Retailer 11
-
£1,363 GBP
View
Price last confirmed 17 days ago
B
Retailer 12
-
£1,385 GBP
View
Most Expensive
Rare Carat
LC9036889OA782 · Aug 9
£1,479 GBP
$1,997 USD
View
Price last confirmed 86 days ago
12 more retailers have this diamond
Prices start from £349 GBPSave up to £1,036 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 Radiant
£349 GBP