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Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG780664167

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664167

Diamond specifications and retailer prices

From HK$12,240 HKD
$1,560 USD
As of November 2, 2026
Save HK$42,212 HKD (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$54,452 HKD at With Clarity · As of November 2, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780664167 or 780664167. Listed at 15 retailers as of November 2, 2026, with prices from HK$12,240 to HK$54,452, a HK$42,212 spread on the same certified stone. With Clarity lists it at HK$54,452. 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 angle35.9°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664167
Dimensions12.28 × 6.30 × 4.02 mm
L/W Ratio1.95
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
12.28 mm6.30 mm1.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664167
Side View
Table 59.0%Crown 35.9°Girdle: Slightly ThickPavilion 40°Culet: NoneDepth 63.8%

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: Nov 2
Current: HK$15,474 HKD|Low: HK$12,240 HKD|High: HK$37,418 HKD|Avg: HK$22,918 HKD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 2HK$12,240 HKD
Retailer 3HK$12,970 HKD
Retailer 1HK$15,474 HKD
Retailer 11HK$16,100 HKD
Retailer 7HK$17,169 HKD
Retailer 9HK$19,066 HKD
Retailer 8HK$19,609 HKD
Retailer 4HK$27,653 HKD
Retailer 12HK$30,882 HKD
Retailer 6HK$32,954 HKD
Retailer 5HK$34,268 HKD
Retailer 10HK$37,362 HKD

42 data points across 12 retailers

15 retailersHK$12,240 HKD to HK$54,452 HKD

A
Cheapest Retailer
-
HK$12,240 HKD
$1,560 USD
A
Retailer 2
-
HK$12,970 HKD
$1,653 USD
View
A
Retailer 3
-
HK$13,056 HKD
View
A
Retailer 4
-
HK$15,474 HKD
£1,553 GBP
View
B+
Retailer 5
-
HK$16,100 HKD
$2,052 USD
View
B+
Retailer 6
-
HK$17,169 HKD
€2,084 EUR
View
B+
Retailer 7
-
HK$19,066 HKD
$2,430 USD
View
B+
Retailer 8
-
HK$19,609 HKD
ZAR 40,374 ZAR
View
Retailer 9
-
HK$27,653 HKD
$3,524 USD
View
Price last confirmed 9 days ago
B
Retailer 10
-
HK$30,882 HKD
$3,936 USD
View
B
Retailer 11
-
HK$32,954 HKD
$4,200 USD
View
B
Retailer 12
-
HK$34,268 HKD
£3,439 GBP
View
B
Retailer 13
-
HK$37,356 HKD
$4,761 USD
View
Retailer 14
-
HK$37,362 HKD
A$7,326 AUD
View
Price last confirmed 25 days ago
Most Expensive
B
With Clarity
780664167 · Nov 2
HK$54,452 HKD
$6,940 USD
View
14 more retailers have this diamond
Prices start from HK$12,240 HKDSave up to HK$42,212 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$12,240 HKD