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Round|Lab Grown|IGI

1.03ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG811623859

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811623859

Diamond specifications and retailer prices

From £120 GBP
As of November 5, 2026
Save £675 GBP (85%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £796 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG811623859 or 811623859. Listed at 22 retailers as of November 5, 2026, with prices from £120 to £796, a £675 spread on the same certified stone. Reve Diamonds lists it at £796. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811623859
Dimensions6.48 × 6.43 × 4.04 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.48 mm6.43 mm1.03 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811623859
Side View
Table 56.0%Crown 35.6°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £268 GBP|Low: £119 GBP|High: £796 GBP|Avg: £325 GBP|+2.3%
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 7£120 GBP
Retailer 2£134 GBP
Retailer 15£139 GBP
Retailer 3£149 GBP
Retailer 5£149 GBP
Retailer 16£214 GBP
Retailer 12£238 GBP
Retailer 10£259 GBP
Retailer 1£268 GBP
Retailer 4£269 GBP
Retailer 17£329 GBP
Retailer 9£346 GBP
Retailer 13£391 GBP
Retailer 11£438 GBP
Retailer 8£478 GBP
Retailer 6£519 GBP
Retailer 14£695 GBP
Reve Diamonds£796 GBP

45 data points across 18 retailers

22 retailers£120 GBP to £796 GBP

Retailer 1
-
£119 GBP
Price last confirmed 45 days ago
A
Retailer 2
-
£120 GBP
View
A
Retailer 3
-
£134 GBP
View
Final sale: no returns
A
Retailer 4
-
£139 GBP
View
Retailer 5
-
£139 GBP
View
Price last confirmed 66 days ago
Retailer 6
-
£146 GBP
View
Price last confirmed 45 days ago
Retailer 7
-
£149 GBP
View
Price last confirmed 12 days ago
A
Retailer 8
-
£149 GBP
View
A
Retailer 9
-
£214 GBP
View
A
Retailer 10
-
£238 GBP
View
B+
Retailer 11
-
£259 GBP
View
B+
Retailer 12
-
£268 GBP
View
B+
Retailer 13
-
£269 GBP
View
B+
Retailer 14
-
£329 GBP
View
B
Retailer 15
-
£346 GBP
View
B
Retailer 16
-
£391 GBP
View
B
Retailer 17
-
£438 GBP
View
Retailer 18
-
£475 GBP
View
Price last confirmed 46 days ago
B
Retailer 19
-
£478 GBP
View
B
Retailer 20
-
£519 GBP
View
B
Retailer 21
-
£695 GBP
View
Most Expensive
B
Reve Diamonds
DFF352A92 · Nov 6
£796 GBP
$1,071 USD
View
21 more retailers have this diamond
Prices start from £120 GBPSave up to £675 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
1.03ct Round
£120 GBP