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Round|Lab Grown|IGI

1.00ct I I1 Round Lab Grown Diamond

EX • I/I1 • IGI LG492123294

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492123294

Diamond specifications and retailer prices

From £291 GBP
$390 USD
As of November 1, 2026
Save £1,120 GBP (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,411 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI LG492123294 or 492123294. Listed at 8 retailers as of November 1, 2026, with prices from £291 to £1,411, a £1,120 spread on the same certified stone. MOH London lists it at £1,411. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
I
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492123294
Dimensions6.45 × 6.50 × 3.84 mm
L/W Ratio1.01
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
6.45 mm6.50 mm1.00 ctI / I1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492123294
Side View
Table 58.5%Crown 32°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 59.4%

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: Nov 1
Current: £1,411 GBP|Low: £291 GBP|High: £1,428 GBP|Avg: £730 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3£291 GBP
Retailer 4£361 GBP
Retailer 5£573 GBP
Retailer 6£655 GBP
Retailer 2£1,014 GBP
MOH London£1,411 GBP

13 data points across 6 retailers

8 retailers£291 GBP to £1,411 GBP

A
Cheapest Retailer
-
£291 GBP
$390 USD
B+
Retailer 2
-
£326 GBP
$437 USD
View
B+
Retailer 3
-
£361 GBP
$484 USD
View
Retailer 4
-
£361 GBP
$484 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£573 GBP
$768 USD
View
B
Retailer 6
-
£1,014 GBP
$1,358 USD
View
B
Retailer 7
-
£1,161 GBP
$1,556 USD
View
Most Expensive
B
MOH London
LG492123294 · Nov 1
£1,411 GBP
View
7 more retailers have this diamond
Prices start from £291 GBPSave up to £1,120 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
1.00ct Round
£291 GBP