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Round|Lab Grown|IGI

1.20ct I VS1 Round Lab Grown Diamond

EX • I/VS1 • IGI LG492123277

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492123277

Diamond specifications and retailer prices

From £708 GBP
$950 USD
As of October 31, 2026
Save £790 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,521 GBP at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG492123277 or 492123277. Listed at 15 retailers as of October 31, 2026, with a 112% 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

1.20
Carat
I
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492123277
Dimensions6.76 × 6.74 × 4.23 mm
L/W Ratio1.00
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
6.76 mm6.74 mm1.20 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492123277
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.7%

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: £2,521 GBP|Low: £708 GBP|High: £3,963 GBP|Avg: £2,049 GBP|+2.4%
Cape Diamonds
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
Retailer 17
Retailer 18
November 1, 2026
Retailer 15£708 GBP
Retailer 14£1,182 GBP
Retailer 4£1,286 GBP
Retailer 3£1,323 GBP
Retailer 16£1,371 GBP
Retailer 18£1,371 GBP
Retailer 9£1,432 GBP
Retailer 7£1,498 GBP
Retailer 8£1,834 GBP
Retailer 17£2,157 GBP
Retailer 11£2,309 GBP
Retailer 13£2,425 GBP
Cape Diamonds£2,521 GBP
Retailer 5£2,570 GBP
Retailer 10£3,069 GBP
Retailer 2£3,304 GBP
Retailer 6£3,305 GBP
Retailer 12£3,921 GBP

28 data points across 18 retailers

15 retailers£708 GBP to £1,498 GBP

B
Cheapest Retailer
-
£708 GBP
$950 USD
B
Retailer 2
-
£1,182 GBP
$1,586 USD
View
B
Retailer 3
-
£1,286 GBP
$1,726 USD
View
B
Retailer 4
-
£1,323 GBP
$1,776 USD
View
Final sale: no returns
Retailer 5
-
£1,371 GBP
$1,840 USD
View
Price last confirmed 21 days ago
B
Retailer 6
-
£1,371 GBP
$1,840 USD
View
B
Retailer 7
-
£1,498 GBP
$2,010 USD
View
Retailer 8
-
£2,157 GBP
$2,895 USD
View
Price under review
Retailer 9
-
£2,309 GBP
€2,951 EUR
View
Price under review
Retailer 10
-
£2,425 GBP
$3,254 USD
View
Price under review
Most Expensive
Cape Diamonds
cert_492123277 · Oct 29
£2,521 GBP
ZAR 54,643 ZAR
View
Price under review
10 more retailers have this diamond
Prices start from £708 GBPSave up to £790 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.

B
1.20ct Round
£708 GBP