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Round|Lab Grown|IGI

1.28ct D VVS1 Round Lab Grown Diamond

ID • D/VVS1 • IGI LG778645614

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645614

Diamond specifications and retailer prices

From £186 GBP
$248 USD
As of October 30, 2026
Save £1,492 GBP (89%) vs most expensive(unlock to see where)
22 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 LG778645614 or 778645614. Listed at 22 retailers as of October 27, 2026, with prices from £186 to £1,678, a £1,492 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 angle34.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645614
Dimensions6.93 × 6.98 × 4.29 mm
L/W Ratio1.01
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
6.93 mm6.98 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645614
Side View
Table 57.0%Crown 34.3°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.7%

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 30
Current: £382 GBP|Low: £132 GBP|High: £947 GBP|Avg: £489 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
Retailer 15
October 30, 2026
Retailer 2£186 GBP
Retailer 6£231 GBP
Retailer 14£278 GBP
Retailer 10£354 GBP
Retailer 9£375 GBP
Retailer 1£382 GBP
Retailer 15£390 GBP
Retailer 3£395 GBP
Retailer 11£504 GBP
Retailer 12£536 GBP
Retailer 4£695 GBP
Retailer 5£702 GBP
Retailer 13£788 GBP
Retailer 8£830 GBP
Retailer 7£947 GBP

40 data points across 15 retailers

22 retailers£186 GBP to £1,678 GBP

Retailer 1
-
£159 GBP
$212 USD
Price last confirmed 29 days ago
A
Retailer 2
-
£186 GBP
$248 USD
View
Final sale: no returns
Retailer 3
-
£193 GBP
$257 USD
View
Price last confirmed 24 days ago
Retailer 4
-
£206 GBP
$274 USD
View
Price last confirmed 28 days ago
A
Retailer 5
-
£231 GBP
HK$2,400 HKD
View
B+
Retailer 6
-
£278 GBP
$370 USD
View
A
Retailer 7
-
£354 GBP
ZAR 7,614 ZAR
View
A
Retailer 8
-
£375 GBP
€475 EUR
View
A
Retailer 9
-
£382 GBP
View
B+
Retailer 10
-
£390 GBP
$519 USD
View
B+
Retailer 11
-
£395 GBP
$526 USD
View
B+
Retailer 12
-
£504 GBP
A$1,032 AUD
View
B+
Retailer 13
-
£536 GBP
$714 USD
View
Retailer 14
-
£648 GBP
$863 USD
View
Price last confirmed 88 days ago
Retailer 15
-
£662 GBP
$882 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
£668 GBP
SGD 1,202 SGD
View
B
Retailer 17
-
£702 GBP
$935 USD
View
B
Retailer 18
-
£710 GBP
$945 USD
View
Retailer 19
-
£788 GBP
$1,050 USD
View
Price last confirmed 14 days ago
B+
Retailer 20
-
£830 GBP
View
B
Retailer 21
-
£947 GBP
$1,261 USD
View
Most Expensive
B
Queensmith
LG778645614 · Oct 27
£1,678 GBP
View
21 more retailers have this diamond
Prices start from £186 GBPSave up to £1,492 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
£186 GBP