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Cushion|Lab Grown|IGI

1.51ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG459119539

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG459119539

Diamond specifications and retailer prices

From $244 USD
As of October 30, 2026
Save $1,786 USD (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,030 USD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459119539 or 459119539. Listed at 13 retailers as of October 30, 2026, with prices from $244 to $2,030, a $1,786 spread on the same certified stone. Do Amore Diamonds lists it at $2,030. 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

1.51
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459119539
Dimensions6.63 × 6.39 × 4.55 mm
L/W Ratio1.04
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
6.63 mm6.39 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459119539
Side View
Table 63.5%Crown 35.5°Girdle: MED-THKPavilion 39.7°Culet: NoneDepth 71.2%

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: $540 USD|Low: $168 USD|High: $1,171 USD|Avg: $579 USD|+3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7$244 USD
Retailer 9$374 USD
Retailer 4$408 USD
Retailer 2$484 USD
Retailer 6$517 USD
Retailer 1$540 USD
Retailer 8$631 USD
Retailer 5$1,000 USD
Retailer 3$1,163 USD

43 data points across 9 retailers

13 retailers$244 USD to $2,030 USD

A
Cheapest Retailer
-
$244 USD
Final sale: no returns
A
Retailer 2
-
$374 USD
View
B+
Retailer 3
-
$408 USD
View
A
Retailer 4
-
$410 USD
HK$3,200 HKD
View
A
Retailer 5
-
$484 USD
€461 EUR
View
A
Retailer 6
-
$517 USD
View
A
Retailer 7
-
$540 USD
£426 GBP
View
B+
Retailer 8
-
$631 USD
View
B
Retailer 9
-
$1,000 USD
View
B
Retailer 10
-
$1,100 USD
View
B
Retailer 11
-
$1,163 USD
£916 GBP
View
B
Retailer 12
-
$1,180 USD
SGD 1,595 SGD
View
Most Expensive
B
Do Amore Diamonds
27-7E8361953 · Oct 31
$2,030 USD
View
12 more retailers have this diamond
Prices start from $244 USDSave up to $1,786 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
1.51ct Cushion
$244 USD