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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 $530 USD
£417 GBP
As of November 1, 2026
Save $1,639 USD (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,169 USD at Helzberg Diamonds · As of October 31, 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 October 31, 2026, with prices from $530 to $2,169, a $1,639 spread on the same certified stone. Helzberg Diamonds lists it at $2,169. 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
Color
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 1
Current: $2,169 USD|Low: $501 USD|High: $2,169 USD|Avg: $1,265 USD
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 1, 2026
Retailer 8$501 USD
Retailer 2$530 USD
Retailer 3$760 USD
Retailer 4$793 USD
Retailer 11$800 USD
Retailer 10$823 USD
Retailer 15$861 USD
Retailer 5$957 USD
Retailer 13$1,167 USD
Retailer 16$1,208 USD
Retailer 6$1,593 USD
Retailer 7$1,646 USD
Retailer 17$1,675 USD
Retailer 12$1,743 USD
Retailer 14$1,969 USD
Retailer 9$2,120 USD
Helzberg Diamonds$2,169 USD

32 data points across 17 retailers

17 retailers$530 USD to $2,169 USD

Retailer 1
-
$501 USD
Price last confirmed 7 days ago
A
Retailer 2
-
$530 USD
£417 GBP
View
A
Retailer 3
-
$760 USD
View
A
Retailer 4
-
$793 USD
View
A
Retailer 5
-
$800 USD
€762 EUR
View
A
Retailer 6
-
$823 USD
£648 GBP
View
A
Retailer 7
-
$861 USD
ZAR 13,911 ZAR
View
A
Retailer 8
-
$957 USD
View
A
Retailer 9
-
$1,167 USD
A$1,795 AUD
View
A
Retailer 10
-
$1,208 USD
View
B+
Retailer 11
-
$1,593 USD
SGD 2,153 SGD
View
B+
Retailer 12
-
$1,646 USD
View
Retailer 13
-
$1,675 USD
View
Price last confirmed 13 days ago
B+
Retailer 14
-
$1,743 USD
View
B+
Retailer 15
-
$1,969 USD
£1,550 GBP
View
B+
Retailer 16
-
$2,120 USD
View
Most Expensive
B+
Helzberg Diamonds
ZXZOHMMHMIJJ · Oct 31
$2,169 USD
View
16 more retailers have this diamond
Prices start from $530 USDSave up to $1,639 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
$530 USD