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Round|Lab Grown|IGI

1.03ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • IGI LG472170725

Shape and cutting style on the report: Round brilliant

Certificate IGI LG472170725

Diamond specifications and retailer prices

From £453 GBP
As of November 5, 2026
Save £544 GBP (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,511 GBP at Friendly Diamonds · As of November 4, 2026
View at Friendly Diamonds

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG472170725 or 472170725. Listed at 11 retailers as of November 4, 2026, with a 120% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.03
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG472170725
Dimensions6.61 × 6.56 × 3.87 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.61 mm6.56 mm1.03 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG472170725
Side View
Table 60.0%Crown 32.2°Girdle: MediumPavilion 40.5°Culet: NoneDepth 58.8%

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 5
Current: £1,511 GBP|Low: £453 GBP|High: £2,438 GBP|Avg: £986 GBP
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5£453 GBP
Retailer 4£529 GBP
Retailer 8£592 GBP
Retailer 6£614 GBP
Retailer 2£970 GBP
Retailer 7£997 GBP
Friendly Diamonds£1,511 GBP
Retailer 3£2,403 GBP

44 data points across 8 retailers

11 retailers£453 GBP to £997 GBP

B
Cheapest Retailer
-
£453 GBP
B
Retailer 2
-
£529 GBP
View
B
Retailer 3
-
£576 GBP
View
B
Retailer 4
-
£592 GBP
View
Final sale: no returns
B
Retailer 5
-
£614 GBP
View
Retailer 6
-
£614 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£970 GBP
View
B
Retailer 8
-
£997 GBP
View
Most Expensive
Friendly Diamonds
1589862 · Nov 4
£1,511 GBP
$2,034 USD
View
Price under review
8 more retailers have this diamond
Prices start from £453 GBPSave up to £544 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
1.03ct Round
£453 GBP