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Oval|Lab Grown|IGI

1.59ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG578326356

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG578326356

Diamond specifications and retailer prices

From $536 NZD
$302 USD
As of October 31, 2026
Save $1,647 NZD (75%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,182 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown oval diamond

This 1.59ct lab-grown oval 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 LG578326356 or 578326356. Listed at 22 retailers as of October 31, 2026, with prices from $536 to $2,182, a $1,647 spread on the same certified stone. Brilliant Earth lists it at $2,182. 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

1.59
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578326356
Dimensions9.22 × 6.60 × 4.14 mm
L/W Ratio1.40
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
9.22 mm6.60 mm1.59 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578326356
Side View
Table 59.0%Crown 37.2°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.7%

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: Oct 31
Current: $2,182 NZD|Low: $344 NZD|High: $2,253 NZD|Avg: $1,178 NZD|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 12$500 NZD
Retailer 4$529 NZD
Retailer 11$759 NZD
Retailer 7$896 NZD
Retailer 3$979 NZD
Retailer 13$987 NZD
Retailer 2$1,018 NZD
Retailer 6$1,082 NZD
Retailer 5$1,179 NZD
Retailer 8$1,659 NZD
Retailer 10$1,730 NZD
Retailer 9$2,161 NZD
Brilliant Earth$2,182 NZD

43 data points across 13 retailers

22 retailers$536 NZD to $2,182 NZD

Retailer 1
-
$433 NZD
$244 USD
Price last confirmed 33 days ago
Retailer 2
-
$502 NZD
$283 USD
View
Price last confirmed 18 days ago
Retailer 3
-
$502 NZD
$283 USD
View
Price last confirmed 36 days ago
Retailer 4
-
$529 NZD
$298 USD
View
Price last confirmed 32 days ago
A
Retailer 5
-
$536 NZD
$302 USD
View
Retailer 6
-
$536 NZD
$302 USD
View
Price last confirmed 22 days ago
Retailer 7
-
$536 NZD
$302 USD
View
Price last confirmed 29 days ago
A
Retailer 8
-
$636 NZD
HK$2,800 HKD
View
B+
Retailer 9
-
$759 NZD
$428 USD
View
A
Retailer 10
-
$896 NZD
€481 EUR
View
B+
Retailer 11
-
$979 NZD
$552 USD
View
B+
Retailer 12
-
$987 NZD
$556 USD
View
B+
Retailer 13
-
$1,018 NZD
£452 GBP
View
B+
Retailer 14
-
$1,082 NZD
A$938 AUD
View
B+
Retailer 15
-
$1,179 NZD
$665 USD
View
Retailer 16
-
$1,659 NZD
$935 USD
View
Price last confirmed 13 days ago
Retailer 17
-
$1,725 NZD
$972 USD
View
Price last confirmed 22 days ago
Retailer 18
-
$1,725 NZD
$972 USD
View
Price last confirmed 31 days ago
B
Retailer 19
-
$1,730 NZD
$975 USD
View
B
Retailer 20
-
$1,816 NZD
SGD 1,383 SGD
View
Retailer 21
-
$2,161 NZD
£959 GBP
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
7306134A · Oct 31
$2,182 NZD
$1,230 USD
View
21 more retailers have this diamond
Prices start from $536 NZDSave up to $1,647 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
1.59ct Oval
$536 NZD