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Cushion|Lab Grown|IGI

1.51ct G IF Cushion Lab Grown Diamond

ID • G/IF • IGI LG816616233

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816616233

Diamond specifications and retailer prices

From $754 AUD
£417 GBP
As of November 2, 2026
Save $2,334 AUD (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,088 AUD at Helzberg Diamonds · As of November 2, 2026
View at Helzberg 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816616233 or 816616233. Listed at 17 retailers as of November 2, 2026, with prices from $754 to $3,088, a $2,334 spread on the same certified stone. Helzberg Diamonds lists it at $3,088. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816616233
Dimensions8.56 × 5.85 × 3.86 mm
L/W Ratio1.46
Girdle conditionFaceted
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
8.56 mm5.85 mm1.51 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816616233
Side View
Table 59.0%Crown 35.4°Girdle: MED-THKPavilion 36.4°Culet: NoneDepth 66.0%

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: Nov 2
Current: $3,088 AUD|Low: $713 AUD|High: $3,088 AUD|Avg: $1,796 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 8$713 AUD
Retailer 2$754 AUD
Retailer 3$1,082 AUD
Retailer 4$1,129 AUD
Retailer 12$1,139 AUD
Retailer 11$1,163 AUD
Retailer 10$1,230 AUD
Retailer 5$1,362 AUD
Retailer 14$1,661 AUD
Retailer 16$1,720 AUD
Retailer 6$2,268 AUD
Retailer 7$2,344 AUD
Retailer 17$2,385 AUD
Retailer 13$2,481 AUD
Retailer 15$2,802 AUD
Retailer 9$3,018 AUD
Helzberg Diamonds$3,088 AUD

32 data points across 17 retailers

17 retailers$754 AUD to $3,088 AUD

Retailer 1
-
$713 AUD
$501 USD
Price last confirmed 8 days ago
A
Retailer 2
-
$754 AUD
£417 GBP
View
A
Retailer 3
-
$1,082 AUD
$760 USD
View
A
Retailer 4
-
$1,129 AUD
$793 USD
View
A
Retailer 5
-
$1,139 AUD
€762 EUR
View
A
Retailer 6
-
$1,163 AUD
£643 GBP
View
A
Retailer 7
-
$1,230 AUD
ZAR 13,960 ZAR
View
A
Retailer 8
-
$1,362 AUD
$957 USD
View
A
Retailer 9
-
$1,661 AUD
View
A
Retailer 10
-
$1,720 AUD
$1,208 USD
View
B+
Retailer 11
-
$2,268 AUD
SGD 2,153 SGD
View
B+
Retailer 12
-
$2,344 AUD
$1,646 USD
View
Retailer 13
-
$2,385 AUD
$1,675 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
$2,481 AUD
$1,743 USD
View
B+
Retailer 15
-
$2,802 AUD
£1,550 GBP
View
B+
Retailer 16
-
$3,018 AUD
$2,120 USD
View
Most Expensive
B+
Helzberg Diamonds
ZXZOHMMHMIJJ · Nov 2
$3,088 AUD
$2,169 USD
View
16 more retailers have this diamond
Prices start from $754 AUDSave up to $2,334 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
$754 AUD