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Heart|Lab Grown|IGI

1.78ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG578350395

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG578350395

Diamond specifications and retailer prices

From $1,123 NZD
$633 USD
As of October 30, 2026
Save $6,641 NZD (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $7,764 NZD at Novita Diamonds · As of October 31, 2026
View at Novita Diamonds

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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG578350395 or 578350395. Listed at 23 retailers as of October 30, 2026, with prices from $1,123 to $7,764, a $6,641 spread on the same certified stone. Novita Diamonds lists it at $7,764. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578350395
Dimensions7.36 × 8.30 × 4.93 mm
L/W Ratio1.13
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
7.36 mm8.30 mm1.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578350395
Side View
Table 60.0%Crown 34.3°Girdle: STK-THKPavilion 40.7°Culet: NoneDepth 59.4%

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 30
Current: $7,764 NZD|Low: $1,123 NZD|High: $8,094 NZD|Avg: $3,648 NZD
Novita Diamonds
Retailer 2
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Retailer 22
October 31, 2026
Retailer 20$1,123 NZD
Retailer 10$1,221 NZD
Retailer 12$1,256 NZD
Retailer 6$1,302 NZD
Retailer 5$1,522 NZD
Retailer 19$1,615 NZD
Retailer 22$1,755 NZD
Retailer 21$1,863 NZD
Retailer 15$1,993 NZD
Retailer 2$2,079 NZD
Retailer 18$2,392 NZD
Retailer 4$2,606 NZD
Retailer 16$2,835 NZD
Retailer 3$3,020 NZD
Retailer 7$3,660 NZD
Retailer 17$4,198 NZD
Retailer 9$4,396 NZD
Retailer 11$4,493 NZD
Retailer 8$4,567 NZD
Retailer 14$4,958 NZD
Retailer 13$5,514 NZD
Novita Diamonds$7,764 NZD

37 data points across 22 retailers

23 retailers$1,123 NZD to $7,764 NZD

A
Cheapest Retailer
-
$1,123 NZD
$633 USD
A
Retailer 2
-
$1,221 NZD
$688 USD
View
A
Retailer 3
-
$1,256 NZD
$708 USD
View
Final sale: no returns
A
Retailer 4
-
$1,302 NZD
$734 USD
View
A
Retailer 5
-
$1,522 NZD
HK$6,700 HKD
View
A
Retailer 6
-
$1,615 NZD
$910 USD
View
A
Retailer 7
-
$1,755 NZD
$989 USD
View
A
Retailer 8
-
$1,863 NZD
$1,050 USD
View
Retailer 9
-
$1,993 NZD
$1,123 USD
View
Price last confirmed 14 days ago
A
Retailer 10
-
$2,079 NZD
£922 GBP
View
A
Retailer 11
-
$2,392 NZD
ZAR 21,778 ZAR
View
B+
Retailer 12
-
$2,606 NZD
$1,469 USD
View
B+
Retailer 13
-
$2,835 NZD
A$2,458 AUD
View
B+
Retailer 14
-
$3,020 NZD
$1,702 USD
View
B+
Retailer 15
-
$3,660 NZD
$2,063 USD
View
B+
Retailer 16
-
$4,198 NZD
$2,366 USD
View
B
Retailer 17
-
$4,396 NZD
SGD 3,348 SGD
View
B+
Retailer 18
-
$4,439 NZD
$2,502 USD
View
B
Retailer 19
-
$4,493 NZD
$2,532 USD
View
B
Retailer 20
-
$4,567 NZD
$2,574 USD
View
Retailer 21
-
$4,958 NZD
A$4,299 AUD
View
Price last confirmed 10 days ago
B
Retailer 22
-
$5,514 NZD
£2,447 GBP
View
Most Expensive
B
Novita Diamonds
cert_578350395 · Oct 31
$7,764 NZD
A$6,732 AUD
View
22 more retailers have this diamond
Prices start from $1,123 NZDSave up to $6,641 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
$1,123 NZD