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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754508720

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754508720

Diamond specifications and retailer prices

From $729 NZD
As of November 4, 2026
Save $7,680 NZD (91%) vs most expensive(unlock to see where)
32 retailers carry this diamond
Most expensive: $8,409 NZD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754508720 or 754508720. Listed at 32 retailers as of November 4, 2026, with prices from $729 to $8,409, a $7,680 spread on the same certified stone. Brilliant Earth lists it at $8,409. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754508720
Dimensions7.31 × 7.36 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
7.31 mm7.36 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754508720
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.1%

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 4
Current: $3,197 NZD|Low: $729 NZD|High: $5,322 NZD|Avg: $2,134 NZD|-6.9%
Retailer 1
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 5, 2026
Retailer 8$729 NZD
Retailer 20$1,011 NZD
Retailer 2$1,056 NZD
Retailer 22$1,066 NZD
Retailer 7$1,162 NZD
Retailer 10$1,197 NZD
Retailer 18$1,327 NZD
Retailer 9$1,338 NZD
Retailer 19$1,414 NZD
Retailer 12$1,464 NZD
Retailer 11$1,508 NZD
Retailer 13$1,886 NZD
Retailer 16$1,914 NZD
Retailer 3$2,180 NZD
Retailer 4$2,808 NZD
Retailer 6$2,886 NZD
Retailer 14$2,913 NZD
Retailer 21$3,081 NZD
Retailer 15$3,115 NZD
Retailer 1$3,197 NZD
Retailer 17$3,202 NZD
Retailer 5$5,322 NZD

38 data points across 22 retailers

32 retailers$729 NZD to $8,409 NZD

Retailer 1
-
$600 NZD
Price last confirmed 26 days ago
Retailer 2
-
$633 NZD
View
Price last confirmed 38 days ago
Retailer 3
-
$695 NZD
View
Price last confirmed 30 days ago
A
Retailer 4
-
$729 NZD
View
Final sale: no returns
Retailer 5
-
$736 NZD
View
Price last confirmed 44 days ago
Retailer 6
-
$743 NZD
View
Price last confirmed 26 days ago
Retailer 7
-
$743 NZD
View
Price last confirmed 34 days ago
A
Retailer 8
-
$743 NZD
View
Retailer 9
-
$777 NZD
View
Price last confirmed 37 days ago
A
Retailer 10
-
$1,011 NZD
View
A
Retailer 11
-
$1,066 NZD
View
A
Retailer 12
-
$1,162 NZD
View
A
Retailer 13
-
$1,197 NZD
View
A
Retailer 14
-
$1,327 NZD
View
A
Retailer 15
-
$1,338 NZD
View
A
Retailer 16
-
$1,414 NZD
View
A
Retailer 17
-
$1,464 NZD
View
A
Retailer 18
-
$1,508 NZD
View
B+
Retailer 19
-
$1,886 NZD
View
B+
Retailer 20
-
$1,914 NZD
View
B+
Retailer 21
-
$2,180 NZD
View
Retailer 22
-
$2,638 NZD
View
Price last confirmed 27 days ago
Retailer 23
-
$2,791 NZD
View
Price last confirmed 36 days ago
B+
Retailer 24
-
$2,808 NZD
View
B+
Retailer 25
-
$2,886 NZD
View
B+
Retailer 26
-
$2,913 NZD
View
B+
Retailer 27
-
$3,081 NZD
View
B
Retailer 28
-
$3,115 NZD
View
B+
Retailer 29
-
$3,197 NZD
View
B+
Retailer 30
-
$3,202 NZD
View
B
Retailer 31
-
$5,322 NZD
View
Most Expensive
B
Brilliant Earth
18668765Y · Nov 4
$8,409 NZD
$4,740 USD
View
31 more retailers have this diamond
Prices start from $729 NZDSave up to $7,680 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 Round
$729 NZD