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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 HK$14,358 HKD
$1,830 USD
As of October 31, 2026
Save HK$39,315 HKD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$78,645 HKD 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: HK$29,451 HKD|Low: HK$16,429 HKD|High: HK$44,260 HKD|Avg: HK$28,918 HKD|+2.1%
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 2HK$16,429 HKD
Retailer 8HK$19,457 HKD
Retailer 4HK$21,679 HKD
Retailer 9HK$23,082 HKD
Retailer 6HK$24,360 HKD
Retailer 5HK$28,116 HKD
Retailer 10HK$29,421 HKD
Retailer 1HK$29,451 HKD
Retailer 3HK$39,941 HKD
Retailer 11HK$41,213 HKD
Retailer 7HK$43,912 HKD

41 data points across 11 retailers

15 retailersHK$14,358 HKD to HK$53,673 HKD

A
Cheapest Retailer
-
HK$14,358 HKD
$1,830 USD
A
Retailer 2
-
HK$16,429 HKD
$2,094 USD
View
B+
Retailer 3
-
HK$18,679 HKD
View
B+
Retailer 4
-
HK$19,457 HKD
$2,480 USD
View
B+
Retailer 5
-
HK$21,679 HKD
£2,176 GBP
View
B+
Retailer 6
-
HK$23,082 HKD
$2,942 USD
View
B+
Retailer 7
-
HK$24,360 HKD
€2,957 EUR
View
B+
Retailer 8
-
HK$28,116 HKD
ZAR 57,894 ZAR
View
B
Retailer 9
-
HK$29,421 HKD
$3,750 USD
View
B+
Retailer 10
-
HK$29,451 HKD
A$5,775 AUD
View
Retailer 11
-
HK$39,941 HKD
$5,091 USD
View
Price last confirmed 7 days ago
B
Retailer 12
-
HK$41,213 HKD
$5,253 USD
View
B
Retailer 13
-
HK$43,912 HKD
£4,407 GBP
View
B
Retailer 14
-
HK$53,673 HKD
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 31
HK$78,645 HKD
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from HK$14,358 HKDSave up to HK$39,315 HKD

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
HK$14,358 HKD