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Round|Lab Grown|IGI

1.05ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG685512055

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685512055

Diamond specifications and retailer prices

From £110 GBP
As of November 5, 2026
Save £654 GBP (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £764 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685512055 or 685512055. Listed at 23 retailers as of November 4, 2026, with prices from £110 to £764, a £654 spread on the same certified stone. Reve Diamonds lists it at £764. 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

1.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685512055
Dimensions6.53 × 6.49 × 3.99 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
6.53 mm6.49 mm1.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685512055
Side View
Table 58.0%Crown 34.9°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £364 GBP|Low: £109 GBP|High: £764 GBP|Avg: £306 GBP
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
Reve Diamonds
November 5, 2026
Retailer 5£110 GBP
Retailer 14£123 GBP
Retailer 8£126 GBP
Retailer 3£137 GBP
Retailer 16£137 GBP
Retailer 9£233 GBP
Retailer 2£252 GBP
Retailer 12£267 GBP
Retailer 13£305 GBP
Retailer 15£319 GBP
Retailer 7£361 GBP
Retailer 1£364 GBP
Retailer 6£438 GBP
Retailer 11£464 GBP
Retailer 4£479 GBP
Retailer 10£635 GBP
Reve Diamonds£764 GBP

44 data points across 17 retailers

23 retailers£110 GBP to £764 GBP

Retailer 1
-
£109 GBP
Price last confirmed 45 days ago
A
Retailer 2
-
£110 GBP
View
A
Retailer 3
-
£123 GBP
View
Final sale: no returns
Retailer 4
-
£134 GBP
View
Price last confirmed 45 days ago
Retailer 5
-
£137 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£137 GBP
View
A
Retailer 7
-
£216 GBP
View
A
Retailer 8
-
£233 GBP
View
B+
Retailer 9
-
£252 GBP
View
B+
Retailer 10
-
£267 GBP
View
B+
Retailer 11
-
£297 GBP
View
Retailer 12
-
£305 GBP
View
Price last confirmed 12 days ago
B+
Retailer 13
-
£319 GBP
View
B+
Retailer 14
-
£361 GBP
View
Retailer 15
-
£364 GBP
View
Price last confirmed 21 days ago
B+
Retailer 16
-
£364 GBP
View
B+
Retailer 17
-
£369 GBP
View
Retailer 18
-
£435 GBP
View
Price last confirmed 46 days ago
B
Retailer 19
-
£438 GBP
View
B
Retailer 20
-
£464 GBP
View
B
Retailer 21
-
£479 GBP
View
B
Retailer 22
-
£635 GBP
View
Most Expensive
B
Reve Diamonds
C22A37157 · Nov 4
£764 GBP
$1,028 USD
View
22 more retailers have this diamond
Prices start from £110 GBPSave up to £654 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
1.05ct Round
£110 GBP