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Round|Lab Grown|IGI

1.23ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG487108293

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487108293

Diamond specifications and retailer prices

From £736 GBP
As of November 3, 2026
Save £931 GBP (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,225 GBP at Aida Diamonds · As of October 31, 2026
View at Aida Diamonds

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG487108293 or 487108293. Listed at 14 retailers as of November 3, 2026, with a 126% 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

1.23
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487108293
Dimensions6.82 × 6.84 × 4.25 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
6.82 mm6.84 mm1.23 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487108293
Side View
Table 55.5%Crown 35.7°GirdlePavilion 40.1°Culet: NoneDepth 62.3%

Caratlytics Score

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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: Nov 3
Current: £2,225 GBP|Low: £707 GBP|High: £2,935 GBP|Avg: £1,344 GBP|-0.1%
Aida 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
November 4, 2026
Retailer 11£736 GBP
Retailer 12£785 GBP
Retailer 5£801 GBP
Retailer 4£824 GBP
Retailer 3£854 GBP
Retailer 13£854 GBP
Retailer 9£981 GBP
Retailer 14£1,364 GBP
Retailer 7£1,570 GBP
Retailer 6£1,601 GBP
Retailer 2£1,667 GBP
Retailer 10£1,840 GBP
Aida Diamonds£2,225 GBP
Retailer 8£2,896 GBP

44 data points across 14 retailers

14 retailers£736 GBP to £1,667 GBP

B
Cheapest Retailer
-
£736 GBP
B
Retailer 2
-
£785 GBP
View
B
Retailer 3
-
£801 GBP
View
B
Retailer 4
-
£824 GBP
View
Final sale: no returns
B
Retailer 5
-
£854 GBP
View
Retailer 6
-
£854 GBP
View
Price last confirmed 19 days ago
B
Retailer 7
-
£981 GBP
View
B
Retailer 8
-
£1,364 GBP
View
B
Retailer 9
-
£1,570 GBP
View
B
Retailer 10
-
£1,601 GBP
View
B
Retailer 11
-
£1,667 GBP
View
Retailer 12
-
£1,840 GBP
View
Price under review
Most Expensive
Aida Diamonds
496865673 · Oct 31
£2,225 GBP
A$4,621 AUD
View
Price under review
12 more retailers have this diamond
Prices start from £736 GBPSave up to £931 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
1.23ct Round
£736 GBP