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Round|Lab Grown|IGI

1.51ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG788668298

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788668298

Diamond specifications and retailer prices

From $571 NZD
$322 USD
As of October 29, 2026
Save $2,284 NZD (80%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $3,771 NZD at Rare Carat · As of July 12, 2026
View at Rare Carat

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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG788668298 or 788668298. Listed at 27 retailers as of October 29, 2026, with a 400% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788668298
Dimensions7.29 × 7.33 × 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
7.29 mm7.33 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788668298
Side View
Table 59.0%Crown 35.9°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.4%

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: Oct 29
Current: $3,770 NZD|Low: $548 NZD|High: $3,788 NZD|Avg: $1,622 NZD|-0.5%
Rare Carat
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
October 30, 2026
Retailer 4$571 NZD
Retailer 7$664 NZD
Retailer 6$708 NZD
Retailer 10$708 NZD
Retailer 8$955 NZD
Retailer 22$985 NZD
Retailer 16$1,068 NZD
Retailer 19$1,105 NZD
Retailer 11$1,166 NZD
Retailer 21$1,218 NZD
Retailer 3$1,220 NZD
Retailer 17$1,262 NZD
Retailer 12$1,563 NZD
Retailer 20$1,652 NZD
Retailer 2$1,728 NZD
Retailer 15$2,202 NZD
Retailer 9$2,278 NZD
Retailer 13$2,448 NZD
Retailer 5$2,509 NZD
Retailer 14$2,809 NZD
Retailer 18$2,855 NZD
Rare Carat$3,770 NZD

37 data points across 22 retailers

27 retailers$571 NZD to $2,855 NZD

A
Cheapest Retailer
-
$571 NZD
$322 USD
A
Retailer 2
-
$639 NZD
$360 USD
View
Final sale: no returns
A
Retailer 3
-
$664 NZD
$374 USD
View
A
Retailer 4
-
$708 NZD
$399 USD
View
A
Retailer 5
-
$708 NZD
$399 USD
View
A
Retailer 6
-
$955 NZD
$538 USD
View
A
Retailer 7
-
$985 NZD
$555 USD
View
A
Retailer 8
-
$1,068 NZD
£474 GBP
View
A
Retailer 9
-
$1,105 NZD
€593 EUR
View
A
Retailer 10
-
$1,166 NZD
$657 USD
View
A
Retailer 11
-
$1,218 NZD
ZAR 11,086 ZAR
View
A
Retailer 12
-
$1,220 NZD
A$1,058 AUD
View
A
Retailer 13
-
$1,262 NZD
£560 GBP
View
A
Retailer 14
-
$1,563 NZD
$881 USD
View
A
Retailer 15
-
$1,652 NZD
A$1,432 AUD
View
A
Retailer 16
-
$1,728 NZD
$974 USD
View
B+
Retailer 17
-
$1,748 NZD
$985 USD
View
B+
Retailer 18
-
$2,246 NZD
$1,266 USD
View
B+
Retailer 19
-
$2,278 NZD
$1,284 USD
View
B+
Retailer 20
-
$2,358 NZD
$1,329 USD
View
B+
Retailer 21
-
$2,448 NZD
A$2,123 AUD
View
B+
Retailer 22
-
$2,509 NZD
$1,414 USD
View
B+
Retailer 23
-
$2,724 NZD
$1,535 USD
View
B+
Retailer 24
-
$2,809 NZD
$1,583 USD
View
B+
Retailer 25
-
$2,855 NZD
£1,267 GBP
View
Retailer 26
-
$3,770 NZD
$2,125 USD
View
Price last confirmed 12 days ago
Most Expensive
Rare Carat
ED2986682ED788 · Jul 12
$3,771 NZD
$2,125 USD
View
Price last confirmed 110 days ago
26 more retailers have this diamond
Prices start from $571 NZDSave up to $2,284 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
$571 NZD