CaratHunter
Plans
Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG818655859

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818655859

Diamond specifications and retailer prices

From $2,114 SGD
$1,653 USD
As of November 2, 2026
Save $6,762 SGD (76%) vs most expensive(unlock to see where)
14 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 LG818655859 or 818655859. Listed at 14 retailers as of November 2, 2026, with prices from $2,114 to $8,876, a $6,762 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818655859
Dimensions12.21 × 6.24 × 4.04 mm
L/W Ratio1.96
Girdle conditionFaceted
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
12.21 mm6.24 mm1.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818655859
Side View
Table 58.0%Crown 37°Girdle: Slightly ThickPavilion 40°Culet: NoneDepth 64.7%

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: $2,522 SGD|Low: $2,113 SGD|High: $8,698 SGD|Avg: $4,221 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
With Clarity
November 2, 2026
Retailer 2$2,114 SGD
Retailer 3$2,128 SGD
Retailer 1$2,522 SGD
Retailer 11$2,624 SGD
Retailer 7$2,798 SGD
Retailer 10$3,108 SGD
Retailer 8$3,196 SGD
Retailer 12$5,034 SGD
Retailer 6$5,371 SGD
Retailer 9$5,594 SGD
Retailer 5$6,008 SGD
Retailer 4$6,089 SGD
With Clarity$8,698 SGD

43 data points across 13 retailers

14 retailers$2,114 SGD to $8,876 SGD

A
Cheapest Retailer
-
$2,114 SGD
$1,653 USD
A
Retailer 2
-
$2,128 SGD
HK$13,000 HKD
View
A
Retailer 3
-
$2,276 SGD
$1,780 USD
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
B+
Retailer 9
-
$5,034 SGD
$3,936 USD
View
B+
Retailer 10
-
$5,371 SGD
$4,200 USD
View
B+
Retailer 11
-
$5,594 SGD
£3,444 GBP
View
B
Retailer 12
-
$6,008 SGD
A$7,227 AUD
View
B
Retailer 13
-
$6,089 SGD
$4,761 USD
View
Most Expensive
B
With Clarity
818655859 · Nov 2
$8,876 SGD
$6,940 USD
View
13 more retailers have this diamond
Prices start from $2,114 SGDSave up to $6,762 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
$2,114 SGD