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Round|Lab Grown|IGI

1.64ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG395987168

Shape and cutting style on the report: Round brilliant

Certificate IGI LG395987168

Diamond specifications and retailer prices

From £185 GBP
$248 USD
As of November 1, 2026
Save £640 GBP (78%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £825 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.64ct lab-grown round diamond

This 1.64ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG395987168 or 395987168. Listed at 7 retailers as of October 29, 2026, with prices from £185 to £825, a £640 spread on the same certified stone. MOH London lists it at £825. 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

1.64
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG395987168
Dimensions7.78 × 7.74 × 4.52 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.78 mm7.74 mm1.64 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG395987168
Side View
Table 60.5%Crown 32.7°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 58.3%

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: Nov 1
Current: £825 GBP|Low: £132 GBP|High: £830 GBP|Avg: £441 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6£185 GBP
Retailer 3£337 GBP
Retailer 5£349 GBP
Retailer 2£380 GBP
Retailer 7£454 GBP
Retailer 4£567 GBP
MOH London£825 GBP

41 data points across 7 retailers

7 retailers£185 GBP to £825 GBP

A
Cheapest Retailer
-
£185 GBP
$248 USD
Final sale: no returns
A
Retailer 2
-
£337 GBP
€430 EUR
View
B+
Retailer 3
-
£349 GBP
$468 USD
View
B+
Retailer 4
-
£380 GBP
View
B+
Retailer 5
-
£454 GBP
$608 USD
View
Retailer 6
-
£567 GBP
$760 USD
View
Price last confirmed 11 days ago
Most Expensive
B
MOH London
LG395987168 · Oct 29
£825 GBP
View
6 more retailers have this diamond
Prices start from £185 GBPSave up to £640 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
1.64ct Round
£185 GBP