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Round|Lab Grown|IGI

1.51ct E SI2 Round Lab Grown Diamond

EX • E/SI2 • IGI LG846656607

Shape and cutting style on the report: Round brilliant

Certificate IGI LG846656607

Diamond specifications and retailer prices

From £192 GBP
HK$2,000 HKD
As of October 28, 2026
Save £739 GBP (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £931 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG846656607 or 846656607. Listed at 10 retailers as of October 28, 2026, with prices from £192 to £931, a £739 spread on the same certified stone. Brilliant Earth lists it at £931. 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

1.51
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.3°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846656607
Dimensions7.39 × 7.45 × 4.48 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.39 mm7.45 mm1.51 ctE / SI2
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG846656607
Side View
Table 61.0%Crown 33.3°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.4%

Caratlytics Score

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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: Oct 28
Current: £285 GBP|Low: £158 GBP|High: £818 GBP|Avg: £406 GBP|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 9£158 GBP
Retailer 3£192 GBP
Retailer 6£273 GBP
Retailer 1£285 GBP
Retailer 7£300 GBP
Retailer 8£306 GBP
Retailer 2£518 GBP
Retailer 4£563 GBP
Retailer 5£563 GBP
Retailer 10£818 GBP

4 data points across 10 retailers

10 retailers£192 GBP to £931 GBP

A
Cheapest Retailer
-
£192 GBP
HK$2,000 HKD
A
Retailer 2
-
£273 GBP
View
A
Retailer 3
-
£285 GBP
€362 EUR
View
B+
Retailer 4
-
£300 GBP
View
B+
Retailer 5
-
£306 GBP
$408 USD
View
B
Retailer 6
-
£518 GBP
$690 USD
View
B
Retailer 7
-
£563 GBP
SGD 1,013 SGD
View
B
Retailer 8
-
£563 GBP
$750 USD
View
B
Retailer 9
-
£818 GBP
View
Most Expensive
B
Brilliant Earth
22260958A · Oct 29
£931 GBP
$1,240 USD
View
9 more retailers have this diamond
Prices start from £192 GBPSave up to £739 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
1.51ct Round
£192 GBP