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Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG836666661

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836666661

Diamond specifications and retailer prices

From $440 SGD
£271 GBP
As of November 2, 2026
Save $1,670 SGD (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,110 SGD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836666661 or 836666661. Listed at 12 retailers as of November 2, 2026, with prices from $440 to $2,110, a $1,670 spread on the same certified stone. Brilliant Earth lists it at $2,110. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836666661
Dimensions11.86 × 6.55 × 4.04 mm
L/W Ratio1.81
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.86 mm6.55 mm1.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836666661
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
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: $2,110 SGD|Low: $440 SGD|High: $2,788 SGD|Avg: $1,094 SGD|-24.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 6$440 SGD
Retailer 4$636 SGD
Retailer 7$651 SGD
Retailer 9$675 SGD
Retailer 2$713 SGD
Retailer 10$817 SGD
Retailer 5$880 SGD
Retailer 12$1,215 SGD
Retailer 3$1,278 SGD
Retailer 8$1,511 SGD
Retailer 11$1,533 SGD
Brilliant Earth$2,110 SGD

17 data points across 12 retailers

12 retailers$440 SGD to $2,110 SGD

A
Cheapest Retailer
-
$440 SGD
£271 GBP
B+
Retailer 2
-
$636 SGD
$497 USD
View
A
Retailer 3
-
$651 SGD
ZAR 8,218 ZAR
View
A
Retailer 4
-
$675 SGD
€503 EUR
View
A
Retailer 5
-
$713 SGD
£439 GBP
View
A
Retailer 6
-
$817 SGD
$639 USD
View
A
Retailer 7
-
$880 SGD
A$1,059 AUD
View
B+
Retailer 8
-
$1,215 SGD
$950 USD
View
B+
Retailer 9
-
$1,278 SGD
$999 USD
View
B+
Retailer 10
-
$1,511 SGD
£930 GBP
View
B+
Retailer 11
-
$1,533 SGD
$1,199 USD
View
Most Expensive
B
Brilliant Earth
22163644A · Nov 2
$2,110 SGD
$1,650 USD
View
11 more retailers have this diamond
Prices start from $440 SGDSave up to $1,670 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
$440 SGD