CaratHunter
Plans
Cushion|Lab Grown|IGI

1.21ct D VVS1 Cushion Lab Grown Diamond

VG • D/VVS1 • IGI LG834609843

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

Certificate IGI LG834609843

Diamond specifications and retailer prices

From £206 GBP
As of November 4, 2026
Save £935 GBP (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,141 GBP at Brilliant Earth · As of November 4, 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 very-good cut grade and certified by IGI LG834609843 or 834609843. Listed at 13 retailers as of November 4, 2026, with prices from £206 to £1,141, a £935 spread on the same certified stone. Brilliant Earth lists it at £1,141. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
D
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG834609843
Dimensions6.25 × 6.14 × 4.10 mm
L/W Ratio1.02
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 mm6.14 mm1.21 ctD / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG834609843
Side View
Table 63.0%Crown 36.1°Girdle: STK-THKPavilion 39.7°Culet: NoneDepth 66.8%

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: £1,141 GBP|Low: £202 GBP|High: £1,393 GBP|Avg: £522 GBP|-18.1%
Brilliant Earth
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
November 5, 2026
Retailer 6£202 GBP
Retailer 13£206 GBP
Retailer 11£321 GBP
Retailer 14£336 GBP
Retailer 10£336 GBP
Retailer 7£357 GBP
Retailer 12£433 GBP
Retailer 9£476 GBP
Retailer 8£524 GBP
Retailer 4£666 GBP
Retailer 5£741 GBP
Retailer 2£779 GBP
Retailer 3£913 GBP
Brilliant Earth£1,141 GBP

44 data points across 14 retailers

13 retailers£206 GBP to £1,141 GBP

A
Cheapest Retailer
-
£206 GBP
Final sale: no returns
A
Retailer 2
-
£321 GBP
View
A
Retailer 3
-
£336 GBP
View
A
Retailer 4
-
£336 GBP
View
A
Retailer 5
-
£357 GBP
View
B+
Retailer 6
-
£433 GBP
View
B+
Retailer 7
-
£476 GBP
View
B+
Retailer 8
-
£524 GBP
View
B
Retailer 9
-
£666 GBP
View
Retailer 10
-
£741 GBP
View
Price last confirmed 27 days ago
B
Retailer 11
-
£779 GBP
View
B
Retailer 12
-
£913 GBP
View
Most Expensive
B
Brilliant Earth
22475879A · Nov 4
£1,141 GBP
$1,540 USD
View
12 more retailers have this diamond
Prices start from £206 GBPSave up to £935 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
£206 GBP