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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG529245314

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG529245314

Diamond specifications and retailer prices

From $493 NZD
$278 USD
As of November 1, 2026
Save $1,706 NZD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,199 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG529245314 or 529245314. Listed at 12 retailers as of October 29, 2026, with prices from $493 to $2,199, a $1,706 spread on the same certified stone. MOH London lists it at $2,199. 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

1.50
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529245314
Dimensions6.77 × 6.56 × 4.45 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
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
6.77 mm6.56 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529245314
Side View
Table 62.0%Crown 36.7°Girdle: MED-THKPavilion 40.5°Culet: NoneDepth 67.8%

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: Nov 1
Current: $2,199 NZD|Low: $351 NZD|High: $2,218 NZD|Avg: $1,133 NZD|+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
November 1, 2026
Retailer 11$493 NZD
Retailer 9$546 NZD
Retailer 2$608 NZD
Retailer 10$736 NZD
Retailer 3$894 NZD
Retailer 6$980 NZD
Retailer 12$988 NZD
Retailer 5$1,029 NZD
Retailer 8$1,372 NZD
Retailer 4$1,847 NZD
Retailer 7$2,005 NZD
MOH London$2,199 NZD

42 data points across 12 retailers

12 retailers$493 NZD to $2,199 NZD

A
Cheapest Retailer
-
$493 NZD
$278 USD
Final sale: no returns
Retailer 2
-
$546 NZD
$308 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$608 NZD
£270 GBP
View
B+
Retailer 4
-
$736 NZD
$415 USD
View
A
Retailer 5
-
$894 NZD
$504 USD
View
A
Retailer 6
-
$980 NZD
€526 EUR
View
B+
Retailer 7
-
$988 NZD
$557 USD
View
A
Retailer 8
-
$1,029 NZD
£457 GBP
View
B+
Retailer 9
-
$1,372 NZD
$773 USD
View
B
Retailer 10
-
$1,847 NZD
$1,041 USD
View
B
Retailer 11
-
$2,005 NZD
$1,130 USD
View
Most Expensive
B
MOH London
LG529245314 · Oct 29
$2,199 NZD
£976 GBP
View
11 more retailers have this diamond
Prices start from $493 NZDSave up to $1,706 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
1.50ct Cushion
$493 NZD