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Heart|Lab Grown|IGI

1.78ct E IF Heart Lab Grown Diamond

ID • E/IF • IGI LG578309454

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG578309454

Diamond specifications and retailer prices

From $1,074 NZD
$603 USD
As of October 27, 2026
Save $4,733 NZD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,807 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 1.78ct lab-grown heart diamond

This 1.78ct lab-grown heart 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 LG578309454 or 578309454. Listed at 16 retailers as of October 27, 2026, with prices from $1,074 to $5,807, a $4,733 spread on the same certified stone. MOH London lists it at $5,807. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578309454
Dimensions7.23 × 8.34 × 4.99 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.23 mm8.34 mm1.78 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578309454
Side View
Table 59.0%Crown 33.9°Girdle: MED-THKPavilion 41.4°Culet: NoneDepth 59.8%

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: Oct 27
Current: $5,807 NZD|Low: $1,029 NZD|High: $8,511 NZD|Avg: $2,531 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9$1,074 NZD
Retailer 3$1,202 NZD
Retailer 11$1,202 NZD
Retailer 10$1,330 NZD
Retailer 5$1,377 NZD
Retailer 7$1,558 NZD
Retailer 6$1,930 NZD
Retailer 2$2,082 NZD
Retailer 4$3,166 NZD
Retailer 8$4,147 NZD
Retailer 12$4,204 NZD
MOH London$5,807 NZD

45 data points across 12 retailers

16 retailers$1,074 NZD to $5,807 NZD

A
Cheapest Retailer
-
$1,074 NZD
$603 USD
A
Retailer 2
-
$1,202 NZD
$675 USD
View
Final sale: no returns
A
Retailer 3
-
$1,202 NZD
$675 USD
View
A
Retailer 4
-
$1,330 NZD
$747 USD
View
A
Retailer 5
-
$1,377 NZD
£609 GBP
View
A
Retailer 6
-
$1,459 NZD
HK$6,400 HKD
View
A
Retailer 7
-
$1,558 NZD
$875 USD
View
A
Retailer 8
-
$1,930 NZD
A$1,668 AUD
View
A
Retailer 9
-
$2,082 NZD
£921 GBP
View
B+
Retailer 10
-
$2,658 NZD
$1,493 USD
View
B+
Retailer 11
-
$3,166 NZD
$1,778 USD
View
B
Retailer 12
-
$4,147 NZD
$2,329 USD
View
B
Retailer 13
-
$4,204 NZD
SGD 3,191 SGD
View
B
Retailer 14
-
$4,302 NZD
$2,416 USD
View
B
Retailer 15
-
$4,412 NZD
$2,478 USD
View
Most Expensive
B
MOH London
LG578309454 · Oct 29
$5,807 NZD
£2,568 GBP
View
15 more retailers have this diamond
Prices start from $1,074 NZDSave up to $4,733 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
1.78ct Heart
$1,074 NZD