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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 $2,346 SGD
$1,830 USD
As of October 30, 2026
Save $6,423 SGD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,848 SGD at With Clarity · As of October 30, 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 30
Current: $3,541 SGD|Low: $2,684 SGD|High: $7,231 SGD|Avg: $4,728 SGD|-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 30, 2026
Retailer 2$2,684 SGD
Retailer 7$3,179 SGD
Retailer 1$3,541 SGD
Retailer 9$3,771 SGD
Retailer 5$3,979 SGD
Retailer 4$4,593 SGD
Retailer 10$4,806 SGD
Retailer 8$4,866 SGD
Retailer 3$6,525 SGD
Retailer 11$6,733 SGD
Retailer 6$7,174 SGD

42 data points across 11 retailers

15 retailers$2,346 SGD to $8,768 SGD

A
Cheapest Retailer
-
$2,346 SGD
$1,830 USD
A
Retailer 2
-
$2,684 SGD
$2,094 USD
View
B+
Retailer 3
-
$3,051 SGD
HK$18,600 HKD
View
B+
Retailer 4
-
$3,179 SGD
$2,480 USD
View
B+
Retailer 5
-
$3,541 SGD
£2,176 GBP
View
B+
Retailer 6
-
$3,771 SGD
$2,942 USD
View
B+
Retailer 7
-
$3,979 SGD
€2,957 EUR
View
B+
Retailer 8
-
$4,593 SGD
ZAR 57,894 ZAR
View
B
Retailer 9
-
$4,806 SGD
$3,750 USD
View
Retailer 10
-
$4,866 SGD
A$5,841 AUD
View
Price last confirmed 21 days ago
B
Retailer 11
-
$6,525 SGD
$5,091 USD
View
B
Retailer 12
-
$6,733 SGD
$5,253 USD
View
B
Retailer 13
-
$7,174 SGD
£4,407 GBP
View
B
Retailer 14
-
$8,768 SGD
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 30
$12,848 SGD
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from $2,346 SGDSave up to $6,423 SGD

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
$2,346 SGD