CaratHunter
Plans
Round|Lab Grown|IGI

1.03ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG687537181

Shape and cutting style on the report: Round brilliant

Certificate IGI LG687537181

Diamond specifications and retailer prices

From £108 GBP
As of November 5, 2026
Save £650 GBP (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £758 GBP at Reve Diamonds · As of November 4, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG687537181 or 687537181. Listed at 22 retailers as of November 4, 2026, with prices from £108 to £758, a £650 spread on the same certified stone. Reve Diamonds lists it at £758. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687537181
Dimensions6.44 × 6.48 × 4.02 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
6.44 mm6.48 mm1.03 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687537181
Side View
Table 56.0%Crown 34.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

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 5
Current: £229 GBP|Low: £108 GBP|High: £758 GBP|Avg: £309 GBP|+6.6%
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 6£108 GBP
Retailer 10£121 GBP
Retailer 16£126 GBP
Retailer 2£134 GBP
Retailer 4£134 GBP
Retailer 9£212 GBP
Retailer 1£229 GBP
Retailer 3£249 GBP
Retailer 12£263 GBP
Retailer 13£301 GBP
Retailer 17£317 GBP
Retailer 8£332 GBP
Retailer 7£432 GBP
Retailer 14£456 GBP
Retailer 5£473 GBP
Retailer 15£594 GBP
Retailer 11£626 GBP
Reve Diamonds£758 GBP

45 data points across 18 retailers

22 retailers£108 GBP to £758 GBP

Retailer 1
-
£108 GBP
Price last confirmed 45 days ago
A
Retailer 2
-
£108 GBP
View
A
Retailer 3
-
£121 GBP
View
Final sale: no returns
A
Retailer 4
-
£126 GBP
View
Retailer 5
-
£132 GBP
View
Price last confirmed 45 days ago
A
Retailer 6
-
£134 GBP
View
Retailer 7
-
£134 GBP
View
Price last confirmed 12 days ago
A
Retailer 8
-
£212 GBP
View
A
Retailer 9
-
£229 GBP
View
B+
Retailer 10
-
£249 GBP
View
B+
Retailer 11
-
£263 GBP
View
B+
Retailer 12
-
£301 GBP
View
B+
Retailer 13
-
£317 GBP
View
B+
Retailer 14
-
£332 GBP
View
B+
Retailer 15
-
£361 GBP
View
Retailer 16
-
£429 GBP
View
Price last confirmed 46 days ago
B
Retailer 17
-
£432 GBP
View
B
Retailer 18
-
£456 GBP
View
B
Retailer 19
-
£473 GBP
View
Retailer 20
-
£594 GBP
View
Price last confirmed 14 days ago
B
Retailer 21
-
£626 GBP
View
Most Expensive
B
Reve Diamonds
1533E1E36 · Nov 4
£758 GBP
$1,021 USD
View
21 more retailers have this diamond
Prices start from £108 GBPSave up to £650 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
£108 GBP