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Round|Lab Grown|IGI

1.28ct D VVS1 Round Lab Grown Diamond

ID • D/VVS1 • IGI LG754520678

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754520678

Diamond specifications and retailer prices

From £165 GBP
$221 USD
As of October 29, 2026
Save £1,503 GBP (90%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,668 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 VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG754520678 or 754520678. Listed at 22 retailers as of October 27, 2026, with prices from £165 to £1,668, a £1,503 spread on the same certified stone. Queensmith lists it at £1,668. 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
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754520678
Dimensions6.96 × 6.99 × 4.28 mm
L/W Ratio1.00
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
6.96 mm6.99 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754520678
Side View
Table 59.0%Crown 33.9°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 61.3%

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: Oct 29
Current: £326 GBP|Low: £185 GBP|High: £830 GBP|Avg: £434 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3£185 GBP
Retailer 11£276 GBP
Retailer 1£326 GBP
Retailer 7£352 GBP
Retailer 6£372 GBP
Retailer 4£380 GBP
Retailer 2£387 GBP
Retailer 8£501 GBP
Retailer 9£533 GBP
Retailer 10£784 GBP
Retailer 5£825 GBP

41 data points across 11 retailers

22 retailers£165 GBP to £1,668 GBP

A
Cheapest Retailer
-
£165 GBP
$221 USD
A
Retailer 2
-
£185 GBP
$248 USD
View
Final sale: no returns
A
Retailer 3
-
£192 GBP
$257 USD
View
A
Retailer 4
-
£204 GBP
$274 USD
View
A
Retailer 5
-
£229 GBP
HK$2,400 HKD
View
B+
Retailer 6
-
£276 GBP
$370 USD
View
A
Retailer 7
-
£326 GBP
View
A
Retailer 8
-
£352 GBP
ZAR 7,614 ZAR
View
A
Retailer 9
-
£372 GBP
€475 EUR
View
A
Retailer 10
-
£380 GBP
View
B+
Retailer 11
-
£387 GBP
$519 USD
View
B+
Retailer 12
-
£393 GBP
$526 USD
View
B+
Retailer 13
-
£501 GBP
A$1,032 AUD
View
B+
Retailer 14
-
£533 GBP
$714 USD
View
B
Retailer 15
-
£658 GBP
$882 USD
View
B
Retailer 16
-
£664 GBP
SGD 1,202 SGD
View
B
Retailer 17
-
£698 GBP
$935 USD
View
B
Retailer 18
-
£705 GBP
$945 USD
View
Retailer 19
-
£784 GBP
$1,050 USD
View
Price last confirmed 14 days ago
B
Retailer 20
-
£825 GBP
View
B
Retailer 21
-
£941 GBP
$1,261 USD
View
Most Expensive
B
Queensmith
LG754520678 · Oct 27
£1,668 GBP
View
21 more retailers have this diamond
Prices start from £165 GBPSave up to £1,503 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
£165 GBP