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Cushion|Lab Grown|IGI

1.70ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG519232119

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG519232119

Diamond specifications and retailer prices

From $232 USD
As of October 30, 2026
Save $1,328 USD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,560 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.7ct lab-grown cushion diamond

This 1.7ct 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 standard cut grade and certified by IGI LG519232119 or 519232119. Listed at 13 retailers as of October 29, 2026, with prices from $232 to $1,560, a $1,328 spread on the same certified stone. Brilliant Earth lists it at $1,560. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
D
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519232119
Dimensions6.71 × 6.67 × 4.28 mm
L/W Ratio1.01
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
6.71 mm6.67 mm1.70 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519232119
Side View
Table 62.5%Crown 36.5°Girdle: THK-VTKPavilion 31.6°Culet: NoneDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,560 USD|Low: $232 USD|High: $1,640 USD|Avg: $691 USD|-4.9%
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$232 USD
Retailer 6$348 USD
Retailer 2$420 USD
Retailer 3$471 USD
Retailer 10$524 USD
Retailer 8$596 USD
Retailer 4$626 USD
Retailer 5$1,038 USD
Retailer 7$1,140 USD
Brilliant Earth$1,560 USD

44 data points across 10 retailers

13 retailers$232 USD to $1,560 USD

A
Cheapest Retailer
-
$232 USD
Final sale: no returns
B+
Retailer 2
-
$348 USD
View
A
Retailer 3
-
$420 USD
€400 EUR
View
B+
Retailer 4
-
$471 USD
£371 GBP
View
B+
Retailer 5
-
$524 USD
View
B+
Retailer 6
-
$596 USD
View
B+
Retailer 7
-
$604 USD
View
B+
Retailer 8
-
$626 USD
View
B
Retailer 9
-
$881 USD
View
B
Retailer 10
-
$1,038 USD
£817 GBP
View
Retailer 11
-
$1,140 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
$1,218 USD
View
Most Expensive
B
Brilliant Earth
10788232A · Oct 29
$1,560 USD
View
12 more retailers have this diamond
Prices start from $232 USDSave up to $1,328 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
1.70ct Cushion
$232 USD