CaratHunter
Plans
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 $940 NZD
£417 GBP
As of November 2, 2026
Save $2,908 NZD (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,848 NZD 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 $940 to $3,848, a $2,908 spread on the same certified stone. Helzberg Diamonds lists it at $3,848. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $3,848 NZD|Low: $889 NZD|High: $3,848 NZD|Avg: $2,238 NZD
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$889 NZD
Retailer 2$940 NZD
Retailer 3$1,348 NZD
Retailer 4$1,407 NZD
Retailer 12$1,420 NZD
Retailer 11$1,449 NZD
Retailer 10$1,533 NZD
Retailer 5$1,698 NZD
Retailer 14$2,070 NZD
Retailer 16$2,143 NZD
Retailer 6$2,827 NZD
Retailer 7$2,921 NZD
Retailer 17$2,972 NZD
Retailer 13$3,093 NZD
Retailer 15$3,493 NZD
Retailer 9$3,762 NZD
Helzberg Diamonds$3,848 NZD

32 data points across 17 retailers

17 retailers$940 NZD to $3,848 NZD

Retailer 1
-
$889 NZD
$501 USD
Price last confirmed 8 days ago
A
Retailer 2
-
$940 NZD
£417 GBP
View
A
Retailer 3
-
$1,348 NZD
$760 USD
View
A
Retailer 4
-
$1,407 NZD
$793 USD
View
A
Retailer 5
-
$1,420 NZD
€762 EUR
View
A
Retailer 6
-
$1,449 NZD
£643 GBP
View
A
Retailer 7
-
$1,533 NZD
ZAR 13,960 ZAR
View
A
Retailer 8
-
$1,698 NZD
$957 USD
View
A
Retailer 9
-
$2,070 NZD
A$1,795 AUD
View
A
Retailer 10
-
$2,143 NZD
$1,208 USD
View
B+
Retailer 11
-
$2,827 NZD
SGD 2,153 SGD
View
B+
Retailer 12
-
$2,921 NZD
$1,646 USD
View
Retailer 13
-
$2,972 NZD
$1,675 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
$3,093 NZD
$1,743 USD
View
B+
Retailer 15
-
$3,493 NZD
£1,550 GBP
View
B+
Retailer 16
-
$3,762 NZD
$2,120 USD
View
Most Expensive
B+
Helzberg Diamonds
ZXZOHMMHMIJJ · Nov 2
$3,848 NZD
$2,169 USD
View
16 more retailers have this diamond
Prices start from $940 NZDSave up to $2,908 NZD

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
$940 NZD