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Marquise|Lab Grown|IGI

1.00ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG514268659

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG514268659

Diamond specifications and retailer prices

From $571 USD
As of October 30, 2026
Save $2,521 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,092 USD at MOH London · As of October 29, 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 LG514268659 or 514268659. Listed at 11 retailers as of October 29, 2026, with prices from $571 to $3,092, a $2,521 spread on the same certified stone. MOH London lists it at $3,092. 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 angle35°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514268659
Dimensions10.20 × 5.31 × 3.02 mm
L/W Ratio1.92
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
10.20 mm5.31 mm1.00 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514268659
Side View
Table 53.5%Crown 35°Girdle: THN-STKPavilion 35°Culet: NoneDepth 56.9%

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: $3,092 USD|Low: $549 USD|High: $3,113 USD|Avg: $1,265 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 5$571 USD
Retailer 2$580 USD
Retailer 8$640 USD
Retailer 6$709 USD
Retailer 3$840 USD
Retailer 7$1,091 USD
Retailer 9$1,127 USD
Retailer 4$1,758 USD
Retailer 10$1,899 USD
MOH London$3,092 USD

19 data points across 10 retailers

11 retailers$571 USD to $3,092 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
Most Expensive
B
MOH London
LG514268659 · Oct 29
$3,092 USD
£2,435 GBP
View
10 more retailers have this diamond
Prices start from $571 USDSave up to $2,521 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