Marquise|Lab Grown|IGI

1.28ct D VS1 Marquise Lab Grown Diamond

ID • D/VS1 • IGI LG839664810

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839664810

Diamond specifications and retailer prices

From $345 USD
£272 GBP
As of October 30, 2026
Save $1,025 USD (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,370 USD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

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 D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG839664810 or 839664810. Listed at 8 retailers as of October 26, 2026, with prices from $345 to $1,370, a $1,025 spread on the same certified stone. Brilliant Earth lists it at $1,370. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839664810
Dimensions12.17 × 5.75 × 3.35 mm
L/W Ratio2.12
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.17 mm5.75 mm1.28 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839664810
Side View
Table 62.0%Crown 33.9°Girdle: MED-STKPavilion 39.6°CuletDepth 58.3%

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: Oct 30
Current: $1,370 USD|Low: $345 USD|High: $1,370 USD|Avg: $717 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 3$345 USD
Retailer 4$444 USD
Retailer 6$480 USD
Retailer 5$632 USD
Retailer 2$687 USD
Retailer 8$750 USD
Retailer 7$1,039 USD
Brilliant Earth$1,370 USD

38 data points across 8 retailers

8 retailers$345 USD to $1,370 USD

A
Cheapest Retailer
-
$345 USD
£272 GBP
A
Retailer 2
-
$444 USD
View
A
Retailer 3
-
$480 USD
€457 EUR
View
B+
Retailer 4
-
$632 USD
A$973 AUD
View
B+
Retailer 5
-
$687 USD
View
B+
Retailer 6
-
$750 USD
View
B
Retailer 7
-
$1,039 USD
£818 GBP
View
Most Expensive
B
Brilliant Earth
21562734A · Oct 26
$1,370 USD
View
7 more retailers have this diamond
Prices start from $345 USDSave up to $1,025 USD

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
$345 USD