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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 €284 EUR
$317 USD
As of November 1, 2026
Save €1,292 EUR (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,575 EUR 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 €284 to €1,575, a €1,292 spread on the same certified stone. Brilliant Earth lists it at €1,575. 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
Color
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: €1,575 EUR|Low: €284 EUR|High: €1,996 EUR|Avg: €715 EUR|-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 1, 2026
Retailer 9€284 EUR
Retailer 8€314 EUR
Retailer 6€452 EUR
Retailer 5€456 EUR
Retailer 4€514 EUR
Retailer 3€549 EUR
Retailer 2€550 EUR
Retailer 11€620 EUR
Retailer 10€1,009 EUR
Retailer 7€1,262 EUR
Brilliant Earth€1,575 EUR

40 data points across 11 retailers

11 retailers€284 EUR to €1,575 EUR

A
Cheapest Retailer
-
€284 EUR
$317 USD
Final sale: no returns
Retailer 2
-
€314 EUR
$351 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
€452 EUR
$505 USD
View
A
Retailer 4
-
€456 EUR
$510 USD
View
A
Retailer 5
-
€514 EUR
View
B+
Retailer 6
-
€549 EUR
$613 USD
View
A
Retailer 7
-
€550 EUR
£484 GBP
View
B+
Retailer 8
-
€620 EUR
$693 USD
View
Retailer 9
-
€1,009 EUR
SGD 1,524 SGD
View
Price last confirmed 19 days ago
B
Retailer 10
-
€1,262 EUR
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 31
€1,575 EUR
$1,760 USD
View
10 more retailers have this diamond
Prices start from €284 EURSave up to €1,292 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
1.67ct Cushion
€284 EUR