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Cushion|Lab Grown|IGI

1.51ct G SI1 Cushion Lab Grown Diamond

VG • G/SI1 • IGI LG520298323

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

Certificate IGI LG520298323

Diamond specifications and retailer prices

From $382 USD
As of October 30, 2026
Save $1,968 USD (84%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,350 USD at Do Amore Diamonds · As of November 1, 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 very-good cut grade and certified by IGI LG520298323 or 520298323. Listed at 8 retailers as of October 30, 2026, with prices from $382 to $2,350, a $1,968 spread on the same certified stone. Do Amore Diamonds lists it at $2,350. 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

1.51
Carat
G
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520298323
Dimensions6.54 × 6.47 × 4.52 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.54 mm6.47 mm1.51 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520298323
Side View
Table 62.5%Crown 35°Girdle: STK-VTKPavilion 40.4°Culet: NoneDepth 69.9%

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: $2,350 USD|Low: $382 USD|High: $2,350 USD|Avg: $873 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 3$382 USD
Retailer 5$508 USD
Retailer 2$582 USD
Retailer 6$785 USD
Retailer 7$829 USD
Retailer 8$1,063 USD
Retailer 4$1,347 USD
Do Amore Diamonds$2,350 USD

36 data points across 8 retailers

8 retailers$382 USD to $2,350 USD

A
Cheapest Retailer
-
$382 USD
B+
Retailer 2
-
$508 USD
View
B+
Retailer 3
-
$582 USD
£459 GBP
View
Retailer 4
-
$785 USD
View
Price last confirmed 13 days ago
B+
Retailer 5
-
$829 USD
View
B
Retailer 6
-
$1,063 USD
View
C
Retailer 7
-
$1,347 USD
£1,061 GBP
View
Most Expensive
C
Do Amore Diamonds
27-3AE4D1B28 · Nov 1
$2,350 USD
View
7 more retailers have this diamond
Prices start from $382 USDSave up to $1,968 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
$382 USD