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Marquise|Lab Grown|IGI

1.28ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG818660512

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818660512

Diamond specifications and retailer prices

From $632 SGD
$494 USD
As of November 1, 2026
Save $283 SGD (31%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,080 SGD at Taylor and Hart · As of October 16, 2026
View at Taylor and Hart

About this 1.28ct lab-grown marquise diamond

This 1.28ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818660512 or 818660512. Listed at 5 retailers as of October 28, 2026, with a 45% 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

1.28
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818660512
Dimensions12.85 × 5.23 × 3.33 mm
L/W Ratio2.46
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.85 mm5.23 mm1.28 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG818660512
Side View
Table 55.0%Crown 34°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 63.7%

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 1
Current: $914 SGD|Low: $412 SGD|High: $5,126 SGD|Avg: $1,171 SGD|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
October 28, 2026
Retailer 4$425 SGD
Retailer 5$508 SGD
Retailer 10$513 SGD
Retailer 6$539 SGD
Retailer 3$632 SGD
Retailer 7$719 SGD
Retailer 8$857 SGD
Retailer 1$914 SGD
Taylor and Hart$1,080 SGD
Retailer 9$1,429 SGD
Retailer 2$5,126 SGD

9 data points across 11 retailers

5 retailers$632 SGD to $914 SGD

Retailer 1
-
$425 SGD
$332 USD
Price last confirmed 11 days ago
A
Retailer 2
-
$632 SGD
$494 USD
View
Retailer 3
-
$857 SGD
$670 USD
View
Price last confirmed 41 days ago
B
Retailer 4
-
$914 SGD
A$1,100 AUD
View
Most Expensive
Taylor and Hart
XIN0EJI · Oct 16
$1,080 SGD
$844 USD
View
Price last confirmed 17 days ago
4 more retailers have this diamond
Prices start from $632 SGDSave up to $283 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
1.28ct Marquise
$632 SGD