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Round|Lab Grown|IGI

1.20ct J VS2 Round Lab Grown Diamond

ID • J/VS2 • IGI LG400912172

Shape and cutting style on the report: Round brilliant

Certificate IGI LG400912172

Diamond specifications and retailer prices

From £508 GBP
$680 USD
As of October 30, 2026
Save £2,914 GBP (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,422 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG400912172 or 400912172. Listed at 12 retailers as of October 29, 2026, with prices from £508 to £3,422, a £2,914 spread on the same certified stone. MOH London lists it at £3,422. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
J
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG400912172
Dimensions6.90 × 6.86 × 4.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
6.90 mm6.86 mm1.20 ctJ / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG400912172
Side View
Table 57.0%Crown 34.9°Girdle: MediumPavilion 40.4°Culet: NoneDepth 60.3%

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 30
Current: £3,422 GBP|Low: £508 GBP|High: £3,448 GBP|Avg: £1,566 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 2£508 GBP
Retailer 7£913 GBP
Retailer 11£1,022 GBP
Retailer 8£1,059 GBP
Retailer 10£1,059 GBP
Retailer 12£1,187 GBP
Retailer 4£1,226 GBP
Retailer 13£1,485 GBP
Retailer 9£1,680 GBP
Retailer 6£1,813 GBP
Retailer 3£2,029 GBP
Retailer 5£2,370 GBP
MOH London£3,422 GBP

21 data points across 13 retailers

12 retailers£508 GBP to £3,422 GBP

A
Cheapest Retailer
-
£508 GBP
$680 USD
B+
Retailer 2
-
£913 GBP
$1,223 USD
View
B+
Retailer 3
-
£993 GBP
$1,331 USD
View
B+
Retailer 4
-
£1,022 GBP
$1,370 USD
View
Final sale: no returns
Retailer 5
-
£1,059 GBP
$1,419 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,059 GBP
$1,419 USD
View
B+
Retailer 7
-
£1,187 GBP
$1,590 USD
View
B
Retailer 8
-
£1,680 GBP
$2,251 USD
View
B
Retailer 9
-
£1,813 GBP
€2,313 EUR
View
B
Retailer 10
-
£1,985 GBP
$2,660 USD
View
B
Retailer 11
-
£2,029 GBP
$2,719 USD
View
Most Expensive
B
MOH London
LG400912172 · Oct 29
£3,422 GBP
View
11 more retailers have this diamond
Prices start from £508 GBPSave up to £2,914 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
1.20ct Round
£508 GBP