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Cushion|Lab Grown|IGI

1.21ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG817695911

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

Certificate IGI LG817695911

Diamond specifications and retailer prices

From £179 GBP
$240 USD
As of November 1, 2026
Save £718 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £897 GBP at Flawless Fine Jewelry · As of November 2, 2026
View at Flawless Fine Jewelry

About this 1.21ct lab-grown cushion diamond

This 1.21ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG817695911 or 817695911. Listed at 16 retailers as of November 1, 2026, with prices from £179 to £897, a £718 spread on the same certified stone. Flawless Fine Jewelry lists it at £897. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817695911
Dimensions6.14 × 6.13 × 4.10 mm
L/W Ratio1.00
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
6.14 mm6.13 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817695911
Side View
Table 63.0%Crown 36.3°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
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: Nov 1
Current: £897 GBP|Low: £165 GBP|High: £897 GBP|Avg: £424 GBP|+5.3%
Flawless Fine Jewelry
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
Retailer 16
November 2, 2026
Retailer 8£166 GBP
Retailer 3£179 GBP
Retailer 13£290 GBP
Retailer 12£298 GBP
Retailer 4£304 GBP
Retailer 10£311 GBP
Retailer 14£325 GBP
Retailer 15£412 GBP
Retailer 9£421 GBP
Retailer 2£451 GBP
Retailer 7£485 GBP
Retailer 11£492 GBP
Retailer 16£499 GBP
Retailer 5£595 GBP
Retailer 6£781 GBP
Flawless Fine Jewelry£897 GBP

39 data points across 16 retailers

16 retailers£179 GBP to £897 GBP

Retailer 1
-
£166 GBP
$223 USD
Price last confirmed 8 days ago
A
Retailer 2
-
£179 GBP
$240 USD
View
Final sale: no returns
A
Retailer 3
-
£290 GBP
€370 EUR
View
A
Retailer 4
-
£298 GBP
ZAR 6,464 ZAR
View
A
Retailer 5
-
£304 GBP
$408 USD
View
A
Retailer 6
-
£311 GBP
View
A
Retailer 7
-
£325 GBP
$436 USD
View
B+
Retailer 8
-
£412 GBP
$553 USD
View
B+
Retailer 9
-
£421 GBP
A$870 AUD
View
B+
Retailer 10
-
£451 GBP
$605 USD
View
B+
Retailer 11
-
£485 GBP
A$1,001 AUD
View
B+
Retailer 12
-
£492 GBP
$660 USD
View
B+
Retailer 13
-
£499 GBP
$670 USD
View
B+
Retailer 14
-
£595 GBP
$799 USD
View
B
Retailer 15
-
£781 GBP
View
Most Expensive
B
Flawless Fine Jewelry
5A5E17ACD · Nov 2
£897 GBP
View
15 more retailers have this diamond
Prices start from £179 GBPSave up to £718 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
£179 GBP