Radiant|Lab Grown|IGI

1.29ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG675511885

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

Certificate IGI LG675511885

Diamond specifications and retailer prices

From £230 GBP
As of November 4, 2026
Save £912 GBP (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,407 GBP at Rare Carat · As of October 18, 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 very-good cut grade and certified by IGI LG675511885 or 675511885. Listed at 20 retailers as of November 1, 2026, with a 397% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.29
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG675511885
Dimensions7.69 × 5.08 × 3.82 mm
L/W Ratio1.51
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
7.69 mm5.08 mm1.29 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG675511885
Side View
Table 63.0%Crown 40.5°Girdle: MediumPavilion 36.3°Culet: NoneDepth 75.2%

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: Nov 4
Current: £1,407 GBP|Low: £221 GBP|High: £1,430 GBP|Avg: £624 GBP|-0.2%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 4, 2026
Retailer 18£230 GBP
Retailer 3£257 GBP
Retailer 7£267 GBP
Retailer 6£285 GBP
Retailer 19£285 GBP
Retailer 2£293 GBP
Retailer 9£370 GBP
Retailer 13£400 GBP
Retailer 17£464 GBP
Retailer 8£470 GBP
Retailer 14£491 GBP
Retailer 12£516 GBP
Retailer 10£653 GBP
Retailer 16£876 GBP
Retailer 5£916 GBP
Retailer 4£959 GBP
Retailer 20£1,073 GBP
Retailer 11£1,106 GBP
Retailer 15£1,141 GBP
Rare Carat£1,407 GBP

36 data points across 20 retailers

20 retailers£230 GBP to £1,141 GBP

A
Cheapest Retailer
-
£230 GBP
A
Retailer 2
-
£257 GBP
View
Final sale: no returns
A
Retailer 3
-
£267 GBP
View
Retailer 4
-
£285 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£285 GBP
View
A
Retailer 6
-
£293 GBP
View
Retailer 7
-
£370 GBP
View
Price last confirmed 35 days ago
A
Retailer 8
-
£400 GBP
View
A
Retailer 9
-
£464 GBP
View
A
Retailer 10
-
£470 GBP
View
A
Retailer 11
-
£491 GBP
View
B+
Retailer 12
-
£653 GBP
View
B
Retailer 13
-
£876 GBP
View
B
Retailer 14
-
£916 GBP
View
B
Retailer 15
-
£927 GBP
View
Retailer 16
-
£959 GBP
View
Price last confirmed 34 days ago
Retailer 17
-
£1,064 GBP
View
Price last confirmed 28 days ago
B
Retailer 18
-
£1,073 GBP
View
B
Retailer 19
-
£1,141 GBP
View
Most Expensive
Rare Carat
NE675511885_l_675511885 · Oct 18
£1,407 GBP
$1,900 USD
View
Price last confirmed 16 days ago
19 more retailers have this diamond
Prices start from £230 GBPSave up to £912 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
£230 GBP