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Cushion|Lab Grown|IGI

3.50ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG689557987

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG689557987

Diamond specifications and retailer prices

From $1,148 USD
As of October 30, 2026
Save $4,952 USD (81%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $6,100 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 3.5ct lab-grown cushion diamond

This 3.5ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG689557987 or 689557987. Listed at 3 retailers as of October 29, 2026, with prices from $1,148 to $6,100, a $4,952 spread on the same certified stone. Do Amore Diamonds lists it at $6,100. 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

3.50
Carat
D
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689557987
Dimensions8.95 × 8.52 × 5.88 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
Pre-existing laser inscription on girdle. As Grown - No indication of post-growth treatment.. This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process.
Top View
8.95 mm8.52 mm3.50 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689557987
Side View
Table 59.0%Crown 39.7°Girdle: STK-VTKPavilion 39.1°Culet: NoneDepth 69.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $6,100 USD|Low: $1,148 USD|High: $6,100 USD|Avg: $2,372 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 19, 2026
Retailer 3$1,148 USD
Retailer 6$1,165 USD
Retailer 5$1,495 USD
Retailer 4$1,649 USD
Retailer 2$2,660 USD
Do Amore Diamonds$6,100 USD

4 data points across 6 retailers

3 retailers$1,148 USD to $6,100 USD

B+
Cheapest Retailer
-
$1,148 USD
Retailer 2
-
$2,660 USD
View
Price last confirmed 9 days ago
Most Expensive
C
Do Amore Diamonds
7-1685352 · Oct 29
$6,100 USD
View
2 more retailers have this diamond
Prices start from $1,148 USDSave up to $4,952 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.

B+
3.50ct Cushion
$1,148 USD