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Marquise|Lab Grown|IGI

1.12ct D SI1 Marquise Lab Grown Diamond

EX • D/SI1 • IGI LG839685314

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839685314

Diamond specifications and retailer prices

From $180 USD
As of November 1, 2026
Save $940 USD (84%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,120 USD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.12ct lab-grown marquise diamond

This 1.12ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839685314 or 839685314. Listed at 3 retailers as of October 26, 2026, with prices from $180 to $1,120, a $940 spread on the same certified stone. Brilliant Earth lists it at $1,120. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.12
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839685314
Dimensions11.28 × 5.44 × 3.28 mm
L/W Ratio2.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.28 mm5.44 mm1.12 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839685314
Side View
Table 61.0%Crown 34.4°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 60.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,120 USD|Low: $180 USD|High: $1,130 USD|Avg: $635 USD|-0.9%
Brilliant Earth
Retailer 2
Retailer 3
October 27, 2026
Retailer 2$180 USD
Retailer 3$365 USD
Brilliant Earth$1,120 USD

23 data points across 3 retailers

3 retailers$180 USD to $1,120 USD

A
Cheapest Retailer
-
$180 USD
Final sale: no returns
A
Retailer 2
-
$365 USD
£287 GBP
View
Most Expensive
B
Brilliant Earth
21613888A · Oct 26
$1,120 USD
View
2 more retailers have this diamond
Prices start from $180 USDSave up to $940 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
1.12ct Marquise
$180 USD