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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG508138247

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG508138247

Diamond specifications and retailer prices

From $562 NZD
$317 USD
As of November 1, 2026
Save $2,560 NZD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,123 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct 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 LG508138247 or 508138247. Listed at 11 retailers as of October 31, 2026, with prices from $562 to $3,123, a $2,560 spread on the same certified stone. Brilliant Earth lists it at $3,123. 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

1.67
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508138247
Dimensions7.01 × 6.61 × 4.24 mm
L/W Ratio1.06
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
7.01 mm6.61 mm1.67 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508138247
Side View
Table 57.0%Crown 36°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 64.1%

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: $3,123 NZD|Low: $562 NZD|High: $3,957 NZD|Avg: $1,415 NZD|-18.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$562 NZD
Retailer 8$623 NZD
Retailer 6$896 NZD
Retailer 5$905 NZD
Retailer 4$1,019 NZD
Retailer 3$1,088 NZD
Retailer 2$1,100 NZD
Retailer 11$1,230 NZD
Retailer 10$2,001 NZD
Retailer 7$2,501 NZD
Brilliant Earth$3,123 NZD

41 data points across 11 retailers

11 retailers$562 NZD to $3,123 NZD

A
Cheapest Retailer
-
$562 NZD
$317 USD
Final sale: no returns
Retailer 2
-
$623 NZD
$351 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$896 NZD
$505 USD
View
A
Retailer 4
-
$905 NZD
$510 USD
View
A
Retailer 5
-
$1,019 NZD
€547 EUR
View
B+
Retailer 6
-
$1,088 NZD
$613 USD
View
A
Retailer 7
-
$1,100 NZD
£488 GBP
View
B+
Retailer 8
-
$1,230 NZD
$693 USD
View
Retailer 9
-
$2,001 NZD
SGD 1,524 SGD
View
Price last confirmed 20 days ago
B
Retailer 10
-
$2,501 NZD
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 31
$3,123 NZD
$1,760 USD
View
10 more retailers have this diamond
Prices start from $562 NZDSave up to $2,560 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
1.67ct Cushion
$562 NZD