CaratHunter
Plans
Oval|Lab Grown|IGI

1.21ct E SI1 Oval Lab Grown Diamond

VG • E/SI1 • IGI LG837620232

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG837620232

Diamond specifications and retailer prices

From £806 GBP
$1,080 USD
As of October 31, 2026
4 retailers carry this diamond
Most expensive: £806 GBP at Brilliant Earth
View at Brilliant Earth

About this 1.21ct lab-grown oval diamond

This 1.21ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG837620232 or 837620232. Listed at 4 retailers as of October 31, 2026. 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
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837620232
Dimensions8.24 × 5.85 × 3.79 mm
L/W Ratio1.41
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.24 mm5.85 mm1.21 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837620232
Side View
Table 57.0%Crown 37.2°Girdle: STK-THKPavilion 39.7°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £806 GBP|Low: £172 GBP|High: £806 GBP|Avg: £374 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 11, 2026
Retailer 4£172 GBP
Retailer 7£207 GBP
Retailer 3£265 GBP
Retailer 2£266 GBP
Retailer 6£296 GBP
Retailer 5£722 GBP
Brilliant Earth£806 GBP

16 data points across 7 retailers

4 retailers

Retailer 1
-
£172 GBP
HK$1,800 HKD
Price last confirmed 17 days ago
Retailer 2
-
£207 GBP
$278 USD
View
Price last confirmed 22 days ago
Retailer 3
-
£722 GBP
View
Price last confirmed 27 days ago
Most Expensive
B
Brilliant Earth
21685792A · Oct 31
£806 GBP
$1,080 USD
View
3 more retailers have this diamond

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.

B
1.21ct Oval
£806 GBP