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Marquise|Lab Grown|IGI

1.00ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG506176879

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG506176879

Diamond specifications and retailer prices

From $571 USD
As of October 30, 2026
Save $2,505 USD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,076 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown marquise diamond

This 1ct lab-grown marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG506176879 or 506176879. Listed at 12 retailers as of October 30, 2026, with prices from $571 to $3,076, a $2,505 spread on the same certified stone. MOH London lists it at $3,076. 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

1.00
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.2°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG506176879
Dimensions10.31 × 5.30 × 3.06 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.31 mm5.30 mm1.00 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG506176879
Side View
Table 59.0%Crown 38.2°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 57.7%

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: Oct 30
Current: $3,076 USD|Low: $549 USD|High: $3,113 USD|Avg: $1,353 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$571 USD
Retailer 2$580 USD
Retailer 9$640 USD
Retailer 7$709 USD
Retailer 4$840 USD
Retailer 8$1,091 USD
Retailer 11$1,127 USD
Retailer 5$1,758 USD
Retailer 3$1,899 USD
Retailer 10$2,193 USD
MOH London$3,076 USD

20 data points across 11 retailers

12 retailers$571 USD to $3,076 USD

A
Cheapest Retailer
-
$571 USD
A
Retailer 2
-
$580 USD
View
A
Retailer 3
-
$640 USD
View
Final sale: no returns
A
Retailer 4
-
$640 USD
View
Retailer 5
-
$709 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$709 USD
View
B+
Retailer 7
-
$840 USD
View
B+
Retailer 8
-
$1,091 USD
View
B
Retailer 9
-
$1,758 USD
View
B
Retailer 10
-
$1,864 USD
View
B
Retailer 11
-
$2,193 USD
View
Most Expensive
B
MOH London
LG506176879 · Nov 1
$3,076 USD
£2,422 GBP
View
11 more retailers have this diamond
Prices start from $571 USDSave up to $2,505 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
1.00ct Marquise
$571 USD