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Round|Lab Grown|IGI

1.63ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG451057236

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057236

Diamond specifications and retailer prices

From £1,447 GBP
As of November 5, 2026
Save £1,309 GBP (48%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,780 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.63ct lab-grown round diamond

This 1.63ct lab-grown round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057236 or 451057236. Listed at 8 retailers as of November 5, 2026, with a 90% 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

1.63
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057236
Dimensions7.62 × 7.66 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.62 mm7.66 mm1.63 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057236
Side View
Table 58.5%Crown 31.8°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,780 GBP|Low: £1,389 GBP|High: £4,858 GBP|Avg: £2,571 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3£1,447 GBP
Retailer 6£1,574 GBP
Retailer 4£1,678 GBP
Retailer 8£2,145 GBP
Retailer 7£2,307 GBP
Retailer 5£2,628 GBP
Retailer 2£2,756 GBP
Retailer 9£3,756 GBP
MOH London£4,780 GBP

15 data points across 9 retailers

8 retailers£1,447 GBP to £2,756 GBP

B+
Cheapest Retailer
-
£1,447 GBP
B
Retailer 2
-
£1,574 GBP
View
B
Retailer 3
-
£1,678 GBP
View
Retailer 4
-
£1,678 GBP
View
Price last confirmed 26 days ago
B
Retailer 5
-
£2,307 GBP
View
B
Retailer 6
-
£2,628 GBP
View
B
Retailer 7
-
£2,756 GBP
View
Most Expensive
MOH London
LG451057236 · Nov 5
£4,780 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £1,447 GBPSave up to £1,309 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+
1.63ct Round
£1,447 GBP