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Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754563659

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754563659

Diamond specifications and retailer prices

From $1,358 SGD
$1,062 USD
As of November 2, 2026
Save $5,215 SGD (79%) vs most expensive(unlock to see where)
34 retailers carry this diamond
Most expensive: $12,060 SGD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 LG754563659 or 754563659. Listed at 34 retailers as of November 2, 2026, with a 384% 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
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754563659
Dimensions12.56 × 6.36 × 3.83 mm
L/W Ratio1.97
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
12.56 mm6.36 mm1.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754563659
Side View
Table 63.0%Crown 35.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 60.2%

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: $12,060 SGD|Low: $1,358 SGD|High: $12,060 SGD|Avg: $3,580 SGD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 2, 2026
Retailer 7$1,358 SGD
Retailer 10$1,477 SGD
Retailer 11$1,554 SGD
Retailer 16$1,568 SGD
Retailer 15$1,742 SGD
Retailer 3$1,797 SGD
Retailer 14$1,843 SGD
Retailer 23$1,976 SGD
Retailer 2$2,522 SGD
Retailer 8$2,624 SGD
Retailer 18$2,798 SGD
Retailer 22$2,884 SGD
Retailer 4$3,195 SGD
Retailer 19$3,196 SGD
Retailer 13$4,329 SGD
Retailer 21$4,471 SGD
Retailer 6$4,883 SGD
Retailer 5$4,993 SGD
Retailer 20$5,616 SGD
Retailer 17$6,017 SGD
Retailer 12$6,404 SGD
Retailer 9$6,574 SGD
Do Amore Diamonds$12,060 SGD

44 data points across 23 retailers

34 retailers$1,358 SGD to $6,574 SGD

A
Cheapest Retailer
-
$1,358 SGD
$1,062 USD
Retailer 2
-
$1,358 SGD
$1,062 USD
View
Price last confirmed 25 days ago
Retailer 3
-
$1,358 SGD
$1,062 USD
View
Price last confirmed 33 days ago
Retailer 4
-
$1,477 SGD
$1,155 USD
View
Price last confirmed 34 days ago
Retailer 5
-
$1,554 SGD
$1,215 USD
View
Price last confirmed 34 days ago
A
Retailer 6
-
$1,568 SGD
$1,226 USD
View
Retailer 7
-
$1,576 SGD
$1,232 USD
View
Price last confirmed 30 days ago
Retailer 8
-
$1,576 SGD
$1,232 USD
View
Price last confirmed 23 days ago
A
Retailer 9
-
$1,742 SGD
$1,362 USD
View
Final sale: no returns
A
Retailer 10
-
$1,797 SGD
$1,405 USD
View
A
Retailer 11
-
$1,843 SGD
$1,441 USD
View
Retailer 12
-
$1,976 SGD
£1,216 GBP
View
Price last confirmed 16 days ago
A
Retailer 13
-
$2,210 SGD
HK$13,500 HKD
View
A
Retailer 14
-
$2,522 SGD
£1,553 GBP
View
B+
Retailer 15
-
$2,624 SGD
$2,052 USD
View
B+
Retailer 16
-
$2,798 SGD
€2,084 EUR
View
B+
Retailer 17
-
$2,884 SGD
$2,255 USD
View
B+
Retailer 18
-
$3,195 SGD
$2,498 USD
View
B+
Retailer 19
-
$3,196 SGD
ZAR 40,374 ZAR
View
Retailer 20
-
$3,259 SGD
$2,548 USD
View
Price last confirmed 23 days ago
B+
Retailer 21
-
$3,259 SGD
$2,548 USD
View
Retailer 22
-
$3,259 SGD
$2,548 USD
View
Price last confirmed 33 days ago
B+
Retailer 23
-
$4,329 SGD
A$5,207 AUD
View
B
Retailer 24
-
$4,471 SGD
$3,496 USD
View
Retailer 25
-
$4,507 SGD
$3,524 USD
View
Price last confirmed 9 days ago
B
Retailer 26
-
$4,795 SGD
£2,952 GBP
View
B
Retailer 27
-
$4,883 SGD
$3,818 USD
View
B
Retailer 28
-
$4,993 SGD
$3,904 USD
View
B
Retailer 29
-
$5,616 SGD
£3,458 GBP
View
B
Retailer 30
-
$6,017 SGD
A$7,238 AUD
View
B
Retailer 31
-
$6,176 SGD
$4,829 USD
View
B
Retailer 32
-
$6,404 SGD
View
B
Retailer 33
-
$6,574 SGD
$5,140 USD
View
Most Expensive
Do Amore Diamonds
27-5CCC7A6A6 · Nov 2
$12,060 SGD
$9,430 USD
View
Price under review
33 more retailers have this diamond
Prices start from $1,358 SGDSave up to $5,215 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
$1,358 SGD