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Cushion|Lab Grown|IGI

1.21ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG830658016

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG830658016

Diamond specifications and retailer prices

From £319 GBP
As of November 4, 2026
Save £816 GBP (72%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,364 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.21ct lab-grown cushion diamond

This 1.21ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG830658016 or 830658016. Listed at 13 retailers as of November 4, 2026, with a 256% 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

1.21
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle44.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830658016
Dimensions7.06 × 5.67 × 3.67 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.06 mm5.67 mm1.21 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830658016
Side View
Table 63.0%Crown 36°Girdle: MED-STKPavilion 44.3°Culet: LargeDepth 64.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,135 GBP|Low: £256 GBP|High: £1,427 GBP|Avg: £618 GBP|-20.5%
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 4£284 GBP
Retailer 7£319 GBP
Retailer 3£381 GBP
Retailer 11£400 GBP
Retailer 10£454 GBP
Retailer 12£458 GBP
Retailer 9£490 GBP
Retailer 6£500 GBP
Retailer 5£699 GBP
Retailer 8£708 GBP
Retailer 2£947 GBP
Retailer 1£1,135 GBP

41 data points across 12 retailers

13 retailers£319 GBP to £1,135 GBP

Retailer 1
-
£284 GBP
Price last confirmed 11 days ago
A
Retailer 2
-
£319 GBP
View
Final sale: no returns
A
Retailer 3
-
£381 GBP
View
A
Retailer 4
-
£400 GBP
View
B+
Retailer 5
-
£454 GBP
View
B+
Retailer 6
-
£458 GBP
View
B+
Retailer 7
-
£490 GBP
View
B+
Retailer 8
-
£500 GBP
View
B+
Retailer 9
-
£699 GBP
View
B
Retailer 10
-
£708 GBP
View
B
Retailer 11
-
£947 GBP
View
B
Retailer 12
-
£1,135 GBP
View
Most Expensive
Queensmith
LG830658016 · Oct 27
£1,364 GBP
View
Price last confirmed 8 days ago
12 more retailers have this diamond
Prices start from £319 GBPSave up to £816 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
1.21ct Cushion
£319 GBP