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Cushion|Lab Grown|IGI

1.71ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG523278356

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG523278356

Diamond specifications and retailer prices

From $232 USD
As of October 30, 2026
Save $1,338 USD (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,570 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.71ct lab-grown cushion diamond

This 1.71ct 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 LG523278356 or 523278356. Listed at 12 retailers as of October 29, 2026, with prices from $232 to $1,570, a $1,338 spread on the same certified stone. Brilliant Earth lists it at $1,570. 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

1.71
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle30.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523278356
Dimensions8.03 × 6.14 × 4.09 mm
L/W Ratio1.31
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
8.03 mm6.14 mm1.71 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523278356
Side View
Table 60.5%Crown 35.4°Girdle: MED-THKPavilion 30.4°Culet: NoneDepth 66.6%

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: $1,570 USD|Low: $232 USD|High: $1,650 USD|Avg: $665 USD|-4.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8$232 USD
Retailer 6$350 USD
Retailer 2$420 USD
Retailer 3$474 USD
Retailer 9$527 USD
Retailer 7$597 USD
Retailer 4$630 USD
Retailer 5$1,043 USD
Brilliant Earth$1,570 USD

43 data points across 9 retailers

12 retailers$232 USD to $1,570 USD

A
Cheapest Retailer
-
$232 USD
Final sale: no returns
B+
Retailer 2
-
$350 USD
View
A
Retailer 3
-
$420 USD
€400 EUR
View
A
Retailer 4
-
$474 USD
£373 GBP
View
A
Retailer 5
-
$527 USD
View
A
Retailer 6
-
$597 USD
View
B+
Retailer 7
-
$610 USD
View
A
Retailer 8
-
$630 USD
View
B+
Retailer 9
-
$885 USD
View
B+
Retailer 10
-
$1,043 USD
£821 GBP
View
B
Retailer 11
-
$1,221 USD
View
Most Expensive
B
Brilliant Earth
10788544A · Oct 29
$1,570 USD
View
11 more retailers have this diamond
Prices start from $232 USDSave up to $1,338 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
1.71ct Cushion
$232 USD