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Cushion|Lab Grown|IGI

1.00ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG813634861

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG813634861

Diamond specifications and retailer prices

From $525 NZD
As of November 6, 2026
Save $1,136 NZD (68%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,661 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG813634861 or 813634861. Listed at 11 retailers as of November 4, 2026, with prices from $525 to $1,661, a $1,136 spread on the same certified stone. MOH London lists it at $1,661. 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

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813634861
Dimensions5.88 × 5.78 × 3.79 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
5.88 mm5.78 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813634861
Side View
Table 64.0%Crown 34.1°Girdle: MED-THKPavilion 39.9°Culet: NoneDepth 65.6%

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: Nov 6
Current: $1,661 NZD|Low: $525 NZD|High: $1,684 NZD|Avg: $883 NZD|+2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$525 NZD
Retailer 2$608 NZD
Retailer 3$619 NZD
Retailer 7$644 NZD
Retailer 6$675 NZD
Retailer 5$866 NZD
Retailer 8$927 NZD
Retailer 4$952 NZD
Retailer 10$1,243 NZD
MOH London$1,661 NZD

43 data points across 10 retailers

11 retailers$525 NZD to $1,661 NZD

A
Cheapest Retailer
-
$525 NZD
A
Retailer 2
-
$608 NZD
View
A
Retailer 3
-
$619 NZD
View
A
Retailer 4
-
$644 NZD
View
A
Retailer 5
-
$675 NZD
View
B+
Retailer 6
-
$866 NZD
View
Retailer 7
-
$925 NZD
View
Price last confirmed 103 days ago
B+
Retailer 8
-
$927 NZD
View
B
Retailer 9
-
$952 NZD
View
B
Retailer 10
-
$1,243 NZD
View
Most Expensive
B
MOH London
LG813634861 · Nov 4
$1,661 NZD
£725 GBP
View
10 more retailers have this diamond
Prices start from $525 NZDSave up to $1,136 NZD

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
1.00ct Cushion
$525 NZD