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Round|Lab Grown|IGI

1.30ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG451055575

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055575

Diamond specifications and retailer prices

From £552 GBP
$740 USD
As of October 30, 2026
Save £2,026 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,578 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.3ct lab-grown round diamond

This 1.3ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055575 or 451055575. Listed at 11 retailers as of October 29, 2026, with prices from £552 to £2,578, a £2,026 spread on the same certified stone. MOH London lists it at £2,578. 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

1.30
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055575
Dimensions7.00 × 7.02 × 4.28 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.00 mm7.02 mm1.30 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055575
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 61.1%

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 30
Current: £2,578 GBP|Low: £540 GBP|High: £2,599 GBP|Avg: £1,041 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2£552 GBP
Retailer 5£563 GBP
Retailer 8£630 GBP
Retailer 6£653 GBP
Retailer 4£784 GBP
Retailer 9£1,025 GBP
Retailer 7£1,056 GBP
Retailer 3£1,553 GBP
MOH London£2,578 GBP

19 data points across 9 retailers

11 retailers£552 GBP to £2,578 GBP

A
Cheapest Retailer
-
£552 GBP
$740 USD
A
Retailer 2
-
£563 GBP
$754 USD
View
A
Retailer 3
-
£613 GBP
$821 USD
View
B+
Retailer 4
-
£630 GBP
$844 USD
View
Final sale: no returns
B+
Retailer 5
-
£653 GBP
$875 USD
View
Retailer 6
-
£653 GBP
$875 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
£784 GBP
$1,050 USD
View
B
Retailer 8
-
£1,056 GBP
$1,415 USD
View
B
Retailer 9
-
£1,553 GBP
$2,081 USD
View
B
Retailer 10
-
£1,836 GBP
$2,460 USD
View
Most Expensive
B
MOH London
LG451055575 · Oct 29
£2,578 GBP
View
10 more retailers have this diamond
Prices start from £552 GBPSave up to £2,026 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
1.30ct Round
£552 GBP