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Round|Lab Grown|IGI

1.28ct D VVS1 Round Lab Grown Diamond

ID • D/VVS1 • IGI LG786633620

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786633620

Diamond specifications and retailer prices

From £166 GBP
$221 USD
As of October 29, 2026
Save £1,513 GBP (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £1,678 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 LG786633620 or 786633620. Listed at 23 retailers as of October 27, 2026, with prices from £166 to £1,678, a £1,513 spread on the same certified stone. Queensmith lists it at £1,678. 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 angle33.7°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786633620
Dimensions6.99 × 7.02 × 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
6.99 mm7.02 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786633620
Side View
Table 57.0%Crown 33.7°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.0%

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: Oct 29
Current: £382 GBP|Low: £132 GBP|High: £947 GBP|Avg: £459 GBP|+6.2%
Retailer 1
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
October 30, 2026
Retailer 5£186 GBP
Retailer 3£278 GBP
Retailer 11£328 GBP
Retailer 9£354 GBP
Retailer 8£375 GBP
Retailer 1£382 GBP
Retailer 4£390 GBP
Retailer 6£395 GBP
Retailer 10£504 GBP
Retailer 12£536 GBP
Retailer 13£620 GBP
Retailer 14£788 GBP
Retailer 7£830 GBP
Retailer 2£947 GBP

41 data points across 14 retailers

23 retailers£166 GBP to £1,678 GBP

A
Cheapest Retailer
-
£166 GBP
$221 USD
A
Retailer 2
-
£186 GBP
$248 USD
View
Final sale: no returns
A
Retailer 3
-
£193 GBP
$257 USD
View
A
Retailer 4
-
£206 GBP
$274 USD
View
A
Retailer 5
-
£231 GBP
HK$2,400 HKD
View
B+
Retailer 6
-
£278 GBP
$370 USD
View
Retailer 7
-
£328 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
£354 GBP
ZAR 7,614 ZAR
View
A
Retailer 9
-
£375 GBP
€475 EUR
View
A
Retailer 10
-
£382 GBP
View
B+
Retailer 11
-
£390 GBP
$519 USD
View
B+
Retailer 12
-
£395 GBP
$526 USD
View
B+
Retailer 13
-
£504 GBP
A$1,032 AUD
View
B+
Retailer 14
-
£536 GBP
$714 USD
View
Retailer 15
-
£620 GBP
$825 USD
View
Price last confirmed 16 days ago
B
Retailer 16
-
£662 GBP
$882 USD
View
B
Retailer 17
-
£668 GBP
SGD 1,202 SGD
View
B
Retailer 18
-
£702 GBP
$935 USD
View
B
Retailer 19
-
£710 GBP
$945 USD
View
Retailer 20
-
£788 GBP
$1,050 USD
View
Price last confirmed 14 days ago
B+
Retailer 21
-
£830 GBP
View
B
Retailer 22
-
£947 GBP
$1,261 USD
View
Most Expensive
B
Queensmith
LG786633620 · Oct 27
£1,678 GBP
View
22 more retailers have this diamond
Prices start from £166 GBPSave up to £1,513 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
£166 GBP