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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG539216557

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG539216557

Diamond specifications and retailer prices

From €195 EUR
$218 USD
As of October 30, 2026
Save €879 EUR (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,074 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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 LG539216557 or 539216557. Listed at 12 retailers as of October 30, 2026, with prices from €195 to €1,074, a €879 spread on the same certified stone. Brilliant Earth lists it at €1,074. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539216557
Dimensions6.48 × 6.35 × 4.35 mm
L/W Ratio1.02
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
6.48 mm6.35 mm1.59 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539216557
Side View
Table 57.5%Crown 37.3°Girdle: STK-VTKPavilion 32.9°Culet: NoneDepth 68.5%

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: Oct 30
Current: €1,074 EUR|Low: €195 EUR|High: €1,217 EUR|Avg: €550 EUR|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8€195 EUR
Retailer 6€294 EUR
Retailer 2€357 EUR
Retailer 3€394 EUR
Retailer 9€438 EUR
Retailer 7€517 EUR
Retailer 4€525 EUR
Retailer 5€1,023 EUR
Brilliant Earth€1,074 EUR

42 data points across 9 retailers

12 retailers€195 EUR to €1,074 EUR

A
Cheapest Retailer
-
€195 EUR
$218 USD
Final sale: no returns
B+
Retailer 2
-
€294 EUR
$328 USD
View
A
Retailer 3
-
€357 EUR
View
A
Retailer 4
-
€394 EUR
£347 GBP
View
A
Retailer 5
-
€438 EUR
$490 USD
View
A
Retailer 6
-
€479 EUR
$535 USD
View
B+
Retailer 7
-
€517 EUR
$578 USD
View
A
Retailer 8
-
€525 EUR
$586 USD
View
B
Retailer 9
-
€748 EUR
$835 USD
View
B
Retailer 10
-
€1,023 EUR
£900 GBP
View
B
Retailer 11
-
€1,057 EUR
$1,181 USD
View
Most Expensive
B
Brilliant Earth
10789149A · Oct 31
€1,074 EUR
$1,200 USD
View
11 more retailers have this diamond
Prices start from €195 EURSave up to €879 EUR

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 Cushion
€195 EUR