CaratHunter
Plans
Round|Lab Grown|IGI

1.63ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG425066630

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425066630

Diamond specifications and retailer prices

From £776 GBP
$1,040 USD
As of October 31, 2026
Save £3,512 GBP (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,288 GBP at MOH London · As of October 29, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425066630 or 425066630. Listed at 12 retailers as of October 29, 2026, with prices from £776 to £4,288, a £3,512 spread on the same certified stone. MOH London lists it at £4,288. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425066630
Dimensions7.50 × 7.47 × 4.72 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.50 mm7.47 mm1.63 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG425066630
Side View
Table 54.5%Crown 34.9°Girdle: ThickPavilion 40.9°Culet: NoneDepth 63.1%

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: Oct 31
Current: £4,288 GBP|Low: £776 GBP|High: £4,322 GBP|Avg: £2,403 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2£776 GBP
Retailer 6£1,287 GBP
Retailer 9£1,442 GBP
Retailer 7£1,493 GBP
Retailer 4£1,612 GBP
Retailer 10£1,620 GBP
Retailer 12£1,993 GBP
Retailer 8£2,345 GBP
Retailer 5£2,575 GBP
Retailer 11£4,090 GBP
Retailer 3£4,275 GBP
MOH London£4,288 GBP

17 data points across 12 retailers

12 retailers£776 GBP to £4,288 GBP

A
Cheapest Retailer
-
£776 GBP
$1,040 USD
B+
Retailer 2
-
£1,287 GBP
$1,725 USD
View
B+
Retailer 3
-
£1,401 GBP
$1,877 USD
View
B+
Retailer 4
-
£1,442 GBP
$1,932 USD
View
Final sale: no returns
B
Retailer 5
-
£1,493 GBP
$2,001 USD
View
Retailer 6
-
£1,493 GBP
$2,001 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
£1,620 GBP
$2,170 USD
View
B
Retailer 8
-
£2,345 GBP
$3,142 USD
View
B
Retailer 9
-
£2,575 GBP
$3,450 USD
View
B
Retailer 10
-
£2,799 GBP
$3,751 USD
View
B
Retailer 11
-
£4,090 GBP
$5,480 USD
View
Most Expensive
B
MOH London
LG425066630 · Oct 29
£4,288 GBP
View
11 more retailers have this diamond
Prices start from £776 GBPSave up to £3,512 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
1.63ct Round
£776 GBP