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Round|Lab Grown|IGI

1.21ct E VS1 Round Lab Grown Diamond

EX • E/VS1 • IGI LG818645105

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818645105

Diamond specifications and retailer prices

From £144 GBP
$192 USD
As of October 29, 2026
Save £1,391 GBP (91%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £1,535 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818645105 or 818645105. Listed at 23 retailers as of October 27, 2026, with prices from £144 to £1,535, a £1,391 spread on the same certified stone. Queensmith lists it at £1,535. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818645105
Dimensions6.88 × 6.94 × 4.08 mm
L/W Ratio1.01
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
6.88 mm6.94 mm1.21 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818645105
Side View
Table 62.0%Crown 33°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 59.0%

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 29
Current: £300 GBP|Low: £139 GBP|High: £848 GBP|Avg: £331 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 11£144 GBP
Retailer 4£167 GBP
Retailer 2£179 GBP
Retailer 12£242 GBP
Retailer 1£300 GBP
Retailer 6£302 GBP
Retailer 7£308 GBP
Retailer 5£325 GBP
Retailer 3£363 GBP
Retailer 8£437 GBP
Retailer 10£459 GBP
Retailer 9£839 GBP

38 data points across 12 retailers

23 retailers£144 GBP to £1,535 GBP

A
Cheapest Retailer
-
£144 GBP
$192 USD
A
Retailer 2
-
£162 GBP
$216 USD
View
Final sale: no returns
A
Retailer 3
-
£167 GBP
$223 USD
View
A
Retailer 4
-
£179 GBP
$239 USD
View
A
Retailer 5
-
£179 GBP
$239 USD
View
A
Retailer 6
-
£202 GBP
HK$2,100 HKD
View
B+
Retailer 7
-
£242 GBP
$322 USD
View
B+
Retailer 8
-
£298 GBP
$397 USD
View
A
Retailer 9
-
£300 GBP
View
A
Retailer 10
-
£302 GBP
€383 EUR
View
A
Retailer 11
-
£308 GBP
ZAR 6,619 ZAR
View
B+
Retailer 12
-
£325 GBP
View
B+
Retailer 13
-
£363 GBP
$484 USD
View
B+
Retailer 14
-
£437 GBP
A$896 AUD
View
B
Retailer 15
-
£459 GBP
$611 USD
View
B
Retailer 16
-
£576 GBP
$767 USD
View
B
Retailer 17
-
£585 GBP
SGD 1,053 SGD
View
B
Retailer 18
-
£604 GBP
$804 USD
View
B
Retailer 19
-
£616 GBP
$821 USD
View
Retailer 20
-
£788 GBP
$1,050 USD
View
Price last confirmed 39 days ago
B
Retailer 21
-
£839 GBP
View
B
Retailer 22
-
£878 GBP
$1,169 USD
View
Most Expensive
B
Queensmith
LG818645105 · Oct 27
£1,535 GBP
View
22 more retailers have this diamond
Prices start from £144 GBPSave up to £1,391 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 Round
£144 GBP