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Round|Lab Grown|IGI

1.20ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG494167338

Shape and cutting style on the report: Round brilliant

Certificate IGI LG494167338

Diamond specifications and retailer prices

From £159 GBP
$213 USD
As of October 29, 2026
Save £1,364 GBP (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,523 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG494167338 or 494167338. Listed at 17 retailers as of October 29, 2026, with prices from £159 to £1,523, a £1,364 spread on the same certified stone. Do Amore Diamonds lists it at £1,523. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG494167338
Dimensions6.78 × 6.81 × 4.21 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.78 mm6.81 mm1.20 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG494167338
Side View
Table 57.5%Crown 36°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.1%

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: £1,523 GBP|Low: £158 GBP|High: £1,523 GBP|Avg: £530 GBP
Do Amore Diamonds
Retailer 2
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Retailer 11
Retailer 12
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Retailer 16
October 30, 2026
Retailer 14£159 GBP
Retailer 12£184 GBP
Retailer 3£197 GBP
Retailer 11£197 GBP
Retailer 2£231 GBP
Retailer 9£267 GBP
Retailer 15£370 GBP
Retailer 7£390 GBP
Retailer 13£434 GBP
Retailer 8£508 GBP
Retailer 5£634 GBP
Retailer 6£681 GBP
Retailer 4£698 GBP
Retailer 16£826 GBP
Retailer 10£875 GBP
Do Amore Diamonds£1,523 GBP

14 data points across 16 retailers

17 retailers£159 GBP to £1,523 GBP

A
Cheapest Retailer
-
£159 GBP
$213 USD
A
Retailer 2
-
£184 GBP
$247 USD
View
A
Retailer 3
-
£197 GBP
$264 USD
View
A
Retailer 4
-
£197 GBP
$264 USD
View
B+
Retailer 5
-
£231 GBP
$310 USD
View
A
Retailer 6
-
£267 GBP
View
A
Retailer 7
-
£370 GBP
$496 USD
View
A
Retailer 8
-
£381 GBP
$510 USD
View
A
Retailer 9
-
£390 GBP
$523 USD
View
A
Retailer 10
-
£434 GBP
$581 USD
View
A
Retailer 11
-
£508 GBP
$680 USD
View
A
Retailer 12
-
£634 GBP
$850 USD
View
A
Retailer 13
-
£681 GBP
$912 USD
View
A
Retailer 14
-
£698 GBP
$935 USD
View
B+
Retailer 15
-
£826 GBP
$1,107 USD
View
A
Retailer 16
-
£875 GBP
View
Most Expensive
B
Do Amore Diamonds
27-AE0814E47 · Oct 29
£1,523 GBP
$2,040 USD
View
16 more retailers have this diamond
Prices start from £159 GBPSave up to £1,364 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
£159 GBP