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Round|Lab Grown|IGI

1.28ct D VVS2 Round Lab Grown Diamond

EX • D/VVS2 • IGI LG818644788

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644788

Diamond specifications and retailer prices

From £150 GBP
As of November 5, 2026
Save £741 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,595 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG818644788 or 818644788. Listed at 22 retailers as of November 4, 2026, with a 494% 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

1.28
Carat
D
Colour
VVS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644788
Dimensions6.99 × 7.03 × 4.21 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 mm7.03 mm1.28 ctD / VVS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644788
Side View
Table 61.0%Crown 34.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.1%

Caratlytics Score

How it works →
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 5
Current: £337 GBP|Low: £144 GBP|High: £880 GBP|Avg: £370 GBP|+4.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 2£150 GBP
Retailer 11£167 GBP
Retailer 4£186 GBP
Retailer 3£251 GBP
Retailer 6£305 GBP
Retailer 10£321 GBP
Retailer 1£337 GBP
Retailer 9£341 GBP
Retailer 12£409 GBP
Retailer 7£453 GBP
Retailer 8£485 GBP
Retailer 5£867 GBP

42 data points across 12 retailers

22 retailers£150 GBP to £891 GBP

A
Cheapest Retailer
-
£150 GBP
A
Retailer 2
-
£167 GBP
View
Final sale: no returns
A
Retailer 3
-
£174 GBP
View
Retailer 4
-
£186 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£186 GBP
View
A
Retailer 6
-
£209 GBP
View
B+
Retailer 7
-
£251 GBP
View
A
Retailer 8
-
£305 GBP
View
A
Retailer 9
-
£321 GBP
View
A
Retailer 10
-
£337 GBP
View
A
Retailer 11
-
£341 GBP
View
A
Retailer 12
-
£344 GBP
View
Retailer 13
-
£409 GBP
View
Price last confirmed 18 days ago
B+
Retailer 14
-
£453 GBP
View
B+
Retailer 15
-
£485 GBP
View
B
Retailer 16
-
£598 GBP
View
B
Retailer 17
-
£605 GBP
View
B
Retailer 18
-
£632 GBP
View
B
Retailer 19
-
£637 GBP
View
B
Retailer 20
-
£867 GBP
View
B
Retailer 21
-
£891 GBP
View
Most Expensive
Queensmith
LG818644788 · Oct 27
£1,595 GBP
View
Price last confirmed 8 days ago
21 more retailers have this diamond
Prices start from £150 GBPSave up to £741 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
1.28ct Round
£150 GBP