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Round|Lab Grown|IGI

1.51ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG818644680

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644680

Diamond specifications and retailer prices

From $581 NZD
$327 USD
As of November 1, 2026
Save $4,484 NZD (89%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $5,065 NZD at Brilliant Earth · As of November 2, 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 F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818644680 or 818644680. Listed at 23 retailers as of November 1, 2026, with prices from $581 to $5,065, a $4,484 spread on the same certified stone. Brilliant Earth lists it at $5,065. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644680
Dimensions7.34 × 7.37 × 4.48 mm
L/W Ratio1.00
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
7.34 mm7.37 mm1.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644680
Side View
Table 60.0%Crown 35.3°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.9%

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 1
Current: $5,065 NZD|Low: $558 NZD|High: $5,954 NZD|Avg: $1,876 NZD|-14.9%
Brilliant Earth
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
November 2, 2026
Retailer 3$581 NZD
Retailer 5$720 NZD
Retailer 4$969 NZD
Retailer 13$995 NZD
Retailer 8$1,022 NZD
Retailer 7$1,153 NZD
Retailer 9$1,241 NZD
Retailer 10$1,273 NZD
Retailer 12$1,677 NZD
Retailer 2$1,802 NZD
Retailer 6$2,719 NZD
Retailer 11$2,885 NZD
Retailer 14$3,448 NZD
Brilliant Earth$5,065 NZD

33 data points across 14 retailers

23 retailers$581 NZD to $5,065 NZD

A
Cheapest Retailer
-
$581 NZD
$327 USD
A
Retailer 2
-
$650 NZD
$366 USD
View
Final sale: no returns
A
Retailer 3
-
$674 NZD
$379 USD
View
A
Retailer 4
-
$720 NZD
$405 USD
View
Retailer 5
-
$720 NZD
$405 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$796 NZD
HK$3,500 HKD
View
A
Retailer 7
-
$969 NZD
$545 USD
View
A
Retailer 8
-
$995 NZD
$560 USD
View
A
Retailer 9
-
$1,022 NZD
£453 GBP
View
A
Retailer 10
-
$1,153 NZD
€618 EUR
View
A
Retailer 11
-
$1,241 NZD
ZAR 11,283 ZAR
View
A
Retailer 12
-
$1,273 NZD
£564 GBP
View
B+
Retailer 13
-
$1,536 NZD
$864 USD
View
B+
Retailer 14
-
$1,677 NZD
A$1,452 AUD
View
B+
Retailer 15
-
$1,802 NZD
$1,014 USD
View
B+
Retailer 16
-
$2,286 NZD
$1,286 USD
View
B
Retailer 17
-
$2,304 NZD
SGD 1,752 SGD
View
B
Retailer 18
-
$2,314 NZD
$1,302 USD
View
B
Retailer 19
-
$2,393 NZD
$1,346 USD
View
B
Retailer 20
-
$2,719 NZD
$1,530 USD
View
B+
Retailer 21
-
$2,885 NZD
£1,278 GBP
View
Retailer 22
-
$3,448 NZD
$1,940 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21133635A · Nov 2
$5,065 NZD
$2,850 USD
View
22 more retailers have this diamond
Prices start from $581 NZDSave up to $4,484 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
$581 NZD