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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG520211712

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG520211712

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)
13 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 LG520211712 or 520211712. Listed at 13 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520211712
Dimensions6.53 × 6.34 × 4.23 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
6.53 mm6.34 mm1.59 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520211712
Side View
Table 60.5%Crown 38°Girdle: STK-VTKPavilion 31.3°Culet: NoneDepth 66.7%

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: €575 EUR|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9€195 EUR
Retailer 6€294 EUR
Retailer 2€357 EUR
Retailer 3€394 EUR
Retailer 10€438 EUR
Retailer 8€517 EUR
Retailer 4€525 EUR
Retailer 7€895 EUR
Retailer 5€1,023 EUR
Brilliant Earth€1,074 EUR

43 data points across 10 retailers

13 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
Retailer 10
-
€895 EUR
$1,000 USD
View
Price last confirmed 11 days ago
B
Retailer 11
-
€1,023 EUR
£900 GBP
View
B
Retailer 12
-
€1,057 EUR
$1,181 USD
View
Most Expensive
B
Brilliant Earth
10788323A · Oct 31
€1,074 EUR
$1,200 USD
View
12 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