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Round|Lab Grown|IGI

1.28ct D VVS1 Round Lab Grown Diamond

EX • D/VVS1 • IGI LG778645702

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645702

Diamond specifications and retailer prices

From £166 GBP
$221 USD
As of October 29, 2026
Save £1,474 GBP (90%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £1,640 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 LG778645702 or 778645702. Listed at 25 retailers as of October 27, 2026, with prices from £166 to £1,640, a £1,474 spread on the same certified stone. Queensmith lists it at £1,640. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645702
Dimensions6.89 × 6.92 × 4.32 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
6.89 mm6.92 mm1.28 ctD / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645702
Side View
Table 58.0%Crown 35.6°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.6%

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: £328 GBP|Low: £159 GBP|High: £954 GBP|Avg: £437 GBP|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
October 30, 2026
Retailer 17£166 GBP
Retailer 7£186 GBP
Retailer 5£193 GBP
Retailer 3£206 GBP
Retailer 9£206 GBP
Retailer 2£278 GBP
Retailer 1£328 GBP
Retailer 13£354 GBP
Retailer 12£375 GBP
Retailer 10£382 GBP
Retailer 4£390 GBP
Retailer 14£504 GBP
Retailer 16£536 GBP
Retailer 6£662 GBP
Retailer 8£801 GBP
Retailer 11£830 GBP
Retailer 15£924 GBP

44 data points across 17 retailers

25 retailers£166 GBP to £1,640 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
-
£206 GBP
$274 USD
View
A
Retailer 6
-
£231 GBP
HK$2,400 HKD
View
B+
Retailer 7
-
£278 GBP
$370 USD
View
A
Retailer 8
-
£328 GBP
View
A
Retailer 9
-
£354 GBP
ZAR 7,614 ZAR
View
A
Retailer 10
-
£375 GBP
€475 EUR
View
B+
Retailer 11
-
£382 GBP
View
B+
Retailer 12
-
£390 GBP
$519 USD
View
B+
Retailer 13
-
£395 GBP
$526 USD
View
B+
Retailer 14
-
£504 GBP
A$1,032 AUD
View
B+
Retailer 15
-
£536 GBP
$714 USD
View
B
Retailer 16
-
£662 GBP
$882 USD
View
Retailer 17
-
£666 GBP
$886 USD
View
Price last confirmed 95 days ago
B
Retailer 18
-
£668 GBP
SGD 1,202 SGD
View
B
Retailer 19
-
£702 GBP
$935 USD
View
B
Retailer 20
-
£710 GBP
$945 USD
View
B
Retailer 21
-
£801 GBP
View
B
Retailer 22
-
£830 GBP
View
Retailer 23
-
£924 GBP
$1,230 USD
View
Price last confirmed 14 days ago
B
Retailer 24
-
£947 GBP
$1,261 USD
View
Most Expensive
B
Queensmith
LG778645702 · Oct 27
£1,640 GBP
View
24 more retailers have this diamond
Prices start from £166 GBPSave up to £1,474 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