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Round|Lab Grown|IGI

1.05ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG450028054

Shape and cutting style on the report: Round brilliant

Certificate IGI LG450028054

Diamond specifications and retailer prices

From £455 GBP
$610 USD
As of October 31, 2026
Save £2,815 GBP (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,270 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.05ct lab-grown round diamond

This 1.05ct 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 LG450028054 or 450028054. Listed at 12 retailers as of October 29, 2026, with prices from £455 to £3,270, a £2,815 spread on the same certified stone. MOH London lists it at £3,270. 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

1.05
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450028054
Dimensions6.54 × 6.57 × 3.98 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD). Type IIa
Top View
6.54 mm6.57 mm1.05 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG450028054
Side View
Table 60.0%Crown 33.9°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.8%

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 31
Current: £3,270 GBP|Low: £455 GBP|High: £3,296 GBP|Avg: £1,577 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
October 30, 2026
Retailer 2£455 GBP
Retailer 6£872 GBP
Retailer 10£977 GBP
Retailer 7£1,012 GBP
Retailer 9£1,012 GBP
Retailer 11£1,142 GBP
Retailer 12£1,424 GBP
Retailer 8£1,607 GBP
Retailer 5£1,733 GBP
Retailer 3£1,995 GBP
Retailer 4£2,898 GBP
MOH London£3,270 GBP

21 data points across 12 retailers

12 retailers£455 GBP to £3,270 GBP

A
Cheapest Retailer
-
£455 GBP
$610 USD
B+
Retailer 2
-
£872 GBP
$1,169 USD
View
B+
Retailer 3
-
£949 GBP
$1,272 USD
View
B+
Retailer 4
-
£977 GBP
$1,309 USD
View
Final sale: no returns
Retailer 5
-
£1,012 GBP
$1,356 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
£1,012 GBP
$1,356 USD
View
B
Retailer 7
-
£1,142 GBP
$1,530 USD
View
B
Retailer 8
-
£1,607 GBP
$2,153 USD
View
B
Retailer 9
-
£1,733 GBP
€2,212 EUR
View
B
Retailer 10
-
£1,897 GBP
$2,542 USD
View
B
Retailer 11
-
£1,995 GBP
$2,673 USD
View
Most Expensive
B
MOH London
LG450028054 · Oct 29
£3,270 GBP
View
11 more retailers have this diamond
Prices start from £455 GBPSave up to £2,815 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
1.05ct Round
£455 GBP