CaratHunter
Plans
Cushion|Lab Grown|IGI

1.21ct D VVS1 Cushion Lab Grown Diamond

EX • D/VVS1 • IGI LG808635658

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG808635658

Diamond specifications and retailer prices

From £321 GBP
As of October 31, 2026
Save £820 GBP (72%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,141 GBP at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

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 LG808635658 or 808635658. Listed at 10 retailers as of October 31, 2026, with prices from £321 to £1,141, a £820 spread on the same certified stone. Brilliant Earth lists it at £1,141. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG808635658
Dimensions6.25 × 6.08 × 4.15 mm
L/W Ratio1.03
Girdle conditionFaceted
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
6.25 mm6.08 mm1.21 ctD / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG808635658
Side View
Table 60.0%Crown 34.4°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 68.3%

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: Oct 31
Current: £1,141 GBP|Low: £313 GBP|High: £1,244 GBP|Avg: £596 GBP|-8.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£321 GBP
Retailer 7£336 GBP
Retailer 3£357 GBP
Retailer 6£433 GBP
Retailer 4£524 GBP
Retailer 8£666 GBP
Retailer 9£730 GBP
Retailer 2£779 GBP
Brilliant Earth£1,141 GBP

45 data points across 9 retailers

10 retailers£321 GBP to £1,141 GBP

A
Cheapest Retailer
-
£321 GBP
A
Retailer 2
-
£336 GBP
View
A
Retailer 3
-
£357 GBP
View
B+
Retailer 4
-
£433 GBP
View
B+
Retailer 5
-
£524 GBP
View
B
Retailer 6
-
£666 GBP
View
B+
Retailer 7
-
£730 GBP
View
B
Retailer 8
-
£779 GBP
View
Retailer 9
-
£864 GBP
View
Price last confirmed 115 days ago
Most Expensive
B
Brilliant Earth
20998111A · Nov 3
£1,141 GBP
$1,540 USD
View
9 more retailers have this diamond
Prices start from £321 GBPSave up to £820 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
£321 GBP