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Round|Lab Grown|IGI

1.21ct H VVS1 Round Lab Grown Diamond

ID • H/VVS1 • IGI LG470150718

Shape and cutting style on the report: Round brilliant

Certificate IGI LG470150718

Diamond specifications and retailer prices

From £303 GBP
$407 USD
As of November 1, 2026
Save £883 GBP (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,923 GBP at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG470150718 or 470150718. Listed at 10 retailers as of November 1, 2026, with a 291% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
H
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG470150718
Dimensions6.89 × 6.83 × 4.20 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.89 mm6.83 mm1.21 ctH / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG470150718
Side View
Table 57.5%Crown 34.5°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.2%

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 1
Current: £1,923 GBP|Low: £189 GBP|High: £1,923 GBP|Avg: £622 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 11£189 GBP
Retailer 7£303 GBP
Retailer 8£384 GBP
Retailer 9£440 GBP
Retailer 4£510 GBP
Retailer 10£620 GBP
Retailer 5£722 GBP
Retailer 6£824 GBP
Retailer 3£959 GBP
Retailer 2£1,187 GBP
Do Amore Diamonds£1,923 GBP

21 data points across 11 retailers

10 retailers£303 GBP to £1,187 GBP

A
Cheapest Retailer
-
£303 GBP
$407 USD
B+
Retailer 2
-
£384 GBP
$515 USD
View
B
Retailer 3
-
£440 GBP
$591 USD
View
B
Retailer 4
-
£510 GBP
ZAR 11,067 ZAR
View
B+
Retailer 5
-
£620 GBP
$832 USD
View
B
Retailer 6
-
£722 GBP
A$1,491 AUD
View
B
Retailer 7
-
£824 GBP
$1,106 USD
View
B
Retailer 8
-
£959 GBP
$1,287 USD
View
B
Retailer 9
-
£1,187 GBP
View
Most Expensive
Do Amore Diamonds
27-54A1A685B · Nov 1
£1,923 GBP
$2,580 USD
View
Price under review
9 more retailers have this diamond
Prices start from £303 GBPSave up to £883 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
£303 GBP