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Cushion|Lab Grown|IGI

1.51ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG774618688

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG774618688

Diamond specifications and retailer prices

From $459 AUD
$322 USD
As of November 1, 2026
Save $1,132 AUD (71%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,667 AUD at Reve Diamonds · As of October 25, 2026
View at Reve 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 F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG774618688 or 774618688. Listed at 14 retailers as of October 26, 2026, with a 246% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG774618688
Dimensions7.18 × 5.56 × 3.94 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.18 mm5.56 mm1.51 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG774618688
Side View
Table 64.0%Crown 44.2°Girdle: MED-THKPavilion 33.1°Culet: NoneDepth 70.9%

Caratlytics Score

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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: Nov 1
Current: $850 AUD|Low: $305 AUD|High: $1,750 AUD|Avg: $925 AUD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 2, 2026
Retailer 2$305 AUD
Retailer 11$437 AUD
Retailer 3$459 AUD
Retailer 5$569 AUD
Retailer 8$615 AUD
Retailer 6$673 AUD
Retailer 12$815 AUD
Retailer 1$850 AUD
Retailer 4$1,170 AUD
Retailer 10$1,199 AUD
Retailer 7$1,313 AUD
Retailer 9$1,591 AUD
Reve Diamonds$1,667 AUD

40 data points across 13 retailers

14 retailers$459 AUD to $1,591 AUD

Retailer 1
-
$437 AUD
£241 GBP
Price last confirmed 16 days ago
B+
Retailer 2
-
$459 AUD
$322 USD
View
A
Retailer 3
-
$569 AUD
€380 EUR
View
A
Retailer 4
-
$615 AUD
£340 GBP
View
B+
Retailer 5
-
$673 AUD
$472 USD
View
Retailer 6
-
$815 AUD
$571 USD
View
Price last confirmed 7 days ago
Retailer 7
-
$820 AUD
$575 USD
View
Price last confirmed 20 days ago
B+
Retailer 8
-
$850 AUD
$596 USD
View
B+
Retailer 9
-
$1,170 AUD
$820 USD
View
B+
Retailer 10
-
$1,199 AUD
$840 USD
View
Retailer 11
-
$1,227 AUD
$860 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
$1,313 AUD
$920 USD
View
B
Retailer 13
-
$1,591 AUD
£878 GBP
View
Most Expensive
Reve Diamonds
8532F276D · Oct 25
$1,667 AUD
$1,169 USD
View
Price last confirmed 8 days ago
13 more retailers have this diamond
Prices start from $459 AUDSave up to $1,132 AUD

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
$459 AUD