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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 $1,995 SGD
$1,560 USD
As of November 2, 2026
Save $6,880 SGD (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,876 SGD 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 $1,995 to $8,876, a $6,880 spread on the same certified stone. With Clarity lists it at $8,876. 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

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $2,522 SGD|Low: $1,995 SGD|High: $6,099 SGD|Avg: $3,736 SGD|-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 2$1,995 SGD
Retailer 3$2,114 SGD
Retailer 1$2,522 SGD
Retailer 11$2,624 SGD
Retailer 7$2,798 SGD
Retailer 9$3,108 SGD
Retailer 8$3,196 SGD
Retailer 4$4,507 SGD
Retailer 12$5,034 SGD
Retailer 6$5,371 SGD
Retailer 5$5,586 SGD
Retailer 10$6,090 SGD

42 data points across 12 retailers

15 retailers$1,995 SGD to $8,876 SGD

A
Cheapest Retailer
-
$1,995 SGD
$1,560 USD
A
Retailer 2
-
$2,114 SGD
$1,653 USD
View
A
Retailer 3
-
$2,128 SGD
HK$13,000 HKD
View
A
Retailer 4
-
$2,522 SGD
£1,553 GBP
View
B+
Retailer 5
-
$2,624 SGD
$2,052 USD
View
B+
Retailer 6
-
$2,798 SGD
€2,084 EUR
View
B+
Retailer 7
-
$3,108 SGD
$2,430 USD
View
B+
Retailer 8
-
$3,196 SGD
ZAR 40,374 ZAR
View
Retailer 9
-
$4,507 SGD
$3,524 USD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$5,034 SGD
$3,936 USD
View
B
Retailer 11
-
$5,371 SGD
$4,200 USD
View
B
Retailer 12
-
$5,586 SGD
£3,439 GBP
View
B
Retailer 13
-
$6,089 SGD
$4,761 USD
View
Retailer 14
-
$6,090 SGD
A$7,326 AUD
View
Price last confirmed 24 days ago
Most Expensive
B
With Clarity
780664167 · Nov 2
$8,876 SGD
$6,940 USD
View
14 more retailers have this diamond
Prices start from $1,995 SGDSave up to $6,880 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
$1,995 SGD