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Round|Lab Grown|IGI

1.64ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG436074620

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436074620

Diamond specifications and retailer prices

From $930 USD
As of October 30, 2026
Save $3,798 USD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,728 USD at MOH London · As of October 27, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436074620 or 436074620. Listed at 11 retailers as of October 27, 2026, with prices from $930 to $4,728, a $3,798 spread on the same certified stone. MOH London lists it at $4,728. 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
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436074620
Dimensions7.56 × 7.52 × 4.61 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.56 mm7.52 mm1.64 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436074620
Side View
Table 60.5%Crown 34.4°Girdle: ThickPavilion 40.8°Culet: NoneDepth 61.1%

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: Oct 30
Current: $4,728 USD|Low: $930 USD|High: $4,784 USD|Avg: $2,301 USD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2$930 USD
Retailer 4$1,267 USD
Retailer 7$1,418 USD
Retailer 5$1,470 USD
Retailer 8$1,640 USD
Retailer 3$1,722 USD
Retailer 10$2,038 USD
Retailer 6$2,326 USD
Retailer 9$2,739 USD
Retailer 11$4,205 USD
MOH London$4,728 USD

14 data points across 11 retailers

11 retailers$930 USD to $4,728 USD

A
Cheapest Retailer
-
$930 USD
B+
Retailer 2
-
$1,267 USD
View
B+
Retailer 3
-
$1,378 USD
View
B+
Retailer 4
-
$1,418 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,470 USD
View
Retailer 6
-
$1,470 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
$1,640 USD
View
B
Retailer 8
-
$2,326 USD
View
B
Retailer 9
-
$2,739 USD
View
B
Retailer 10
-
$2,754 USD
View
Most Expensive
B
MOH London
LG436074620 · Oct 27
$4,728 USD
£3,723 GBP
View
10 more retailers have this diamond
Prices start from $930 USDSave up to $3,798 USD

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
$930 USD