CaratHunter
Plans
Marquise|Lab Grown|IGI

1.78ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG780664014

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664014

Diamond specifications and retailer prices

From $3,247 NZD
$1,830 USD
As of October 31, 2026
Save $8,891 NZD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $17,786 NZD at With Clarity · As of October 31, 2026
View at With Clarity

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise 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 LG780664014 or 780664014. Listed at 15 retailers as of October 30, 2026, with a 274% 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

1.78
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664014
Dimensions12.38 × 6.33 × 4.01 mm
L/W Ratio1.96
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
12.38 mm6.33 mm1.78 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664014
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 63.3%

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 31
Current: $4,903 NZD|Low: $3,715 NZD|High: $10,009 NZD|Avg: $6,542 NZD|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 2$3,715 NZD
Retailer 7$4,400 NZD
Retailer 1$4,903 NZD
Retailer 9$5,220 NZD
Retailer 5$5,509 NZD
Retailer 4$6,358 NZD
Retailer 10$6,654 NZD
Retailer 8$6,736 NZD
Retailer 3$9,033 NZD
Retailer 11$9,320 NZD
Retailer 6$9,931 NZD

42 data points across 11 retailers

15 retailers$3,247 NZD to $12,138 NZD

A
Cheapest Retailer
-
$3,247 NZD
$1,830 USD
A
Retailer 2
-
$3,715 NZD
$2,094 USD
View
B+
Retailer 3
-
$4,224 NZD
HK$18,600 HKD
View
B+
Retailer 4
-
$4,400 NZD
$2,480 USD
View
B+
Retailer 5
-
$4,903 NZD
£2,176 GBP
View
B+
Retailer 6
-
$5,220 NZD
$2,942 USD
View
B+
Retailer 7
-
$5,509 NZD
€2,957 EUR
View
B+
Retailer 8
-
$6,358 NZD
ZAR 57,894 ZAR
View
B
Retailer 9
-
$6,654 NZD
$3,750 USD
View
Retailer 10
-
$6,736 NZD
A$5,841 AUD
View
Price last confirmed 22 days ago
Retailer 11
-
$9,033 NZD
$5,091 USD
View
Price last confirmed 7 days ago
B
Retailer 12
-
$9,320 NZD
$5,253 USD
View
B
Retailer 13
-
$9,931 NZD
£4,407 GBP
View
B
Retailer 14
-
$12,138 NZD
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 31
$17,786 NZD
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from $3,247 NZDSave up to $8,891 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 Marquise
$3,247 NZD