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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 $282 USD
As of October 26, 2026
Save $948 USD (77%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $1,230 USD at Brilliant Earth · As of October 29, 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 23 retailers as of October 26, 2026, with prices from $282 to $1,230, a $948 spread on the same certified stone. Brilliant Earth lists it at $1,230. 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
Color
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 26
Current: $1,230 USD|Low: $194 USD|High: $1,270 USD|Avg: $655 USD|-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 29, 2026
Retailer 12$282 USD
Retailer 4$298 USD
Retailer 11$428 USD
Retailer 6$505 USD
Retailer 3$552 USD
Retailer 13$556 USD
Retailer 2$572 USD
Retailer 7$610 USD
Retailer 5$665 USD
Retailer 8$935 USD
Retailer 10$975 USD
Retailer 9$1,218 USD
Brilliant Earth$1,230 USD

42 data points across 13 retailers

23 retailers$282 USD to $1,230 USD

A
Retailer 1
-
$244 USD
Price last confirmed 30 days ago
A
Retailer 2
-
$282 USD
View
Final sale: no returns
A
Retailer 3
-
$283 USD
View
Price last confirmed 15 days ago
A
Retailer 4
-
$283 USD
View
Price last confirmed 33 days ago
A
Retailer 5
-
$298 USD
View
Price last confirmed 30 days ago
A
Retailer 6
-
$302 USD
View
A
Retailer 7
-
$302 USD
View
Price last confirmed 19 days ago
A
Retailer 8
-
$302 USD
View
Price last confirmed 27 days ago
A
Retailer 9
-
$358 USD
HK$2,800 HKD
View
B+
Retailer 10
-
$428 USD
View
A
Retailer 11
-
$505 USD
€481 EUR
View
A
Retailer 12
-
$552 USD
View
A
Retailer 13
-
$556 USD
View
B+
Retailer 14
-
$572 USD
£450 GBP
View
B+
Retailer 15
-
$610 USD
A$938 AUD
View
B+
Retailer 16
-
$665 USD
View
B+
Retailer 17
-
$935 USD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$972 USD
View
Price last confirmed 19 days ago
B
Retailer 19
-
$972 USD
View
Price last confirmed 29 days ago
B
Retailer 20
-
$975 USD
View
B
Retailer 21
-
$1,023 USD
SGD 1,383 SGD
View
B
Retailer 22
-
$1,218 USD
£959 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
7306134A · Oct 29
$1,230 USD
View
22 more retailers have this diamond
Prices start from $282 USDSave up to $948 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
1.59ct Oval
$282 USD