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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 $317 USD
As of October 30, 2026
Save $1,443 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,760 USD at Brilliant Earth · As of October 30, 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 30, 2026, with prices from $317 to $1,760, a $1,443 spread on the same certified stone. Brilliant Earth lists it at $1,760. 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: Oct 30
Current: $1,760 USD|Low: $317 USD|High: $2,230 USD|Avg: $799 USD|-18.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9$317 USD
Retailer 8$351 USD
Retailer 6$505 USD
Retailer 5$510 USD
Retailer 2$574 USD
Retailer 3$613 USD
Retailer 4$620 USD
Retailer 11$693 USD
Retailer 10$1,128 USD
Retailer 7$1,410 USD
Brilliant Earth$1,760 USD

39 data points across 11 retailers

11 retailers$317 USD to $1,760 USD

A
Cheapest Retailer
-
$317 USD
Final sale: no returns
Retailer 2
-
$351 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$505 USD
View
A
Retailer 4
-
$510 USD
View
A
Retailer 5
-
$574 USD
€547 EUR
View
B+
Retailer 6
-
$613 USD
View
A
Retailer 7
-
$620 USD
£488 GBP
View
B+
Retailer 8
-
$693 USD
View
Retailer 9
-
$1,128 USD
SGD 1,524 SGD
View
Price last confirmed 19 days ago
B
Retailer 10
-
$1,410 USD
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 30
$1,760 USD
View
10 more retailers have this diamond
Prices start from $317 USDSave up to $1,443 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
1.67ct Cushion
$317 USD