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Marquise|Lab Grown|IGI

1.58ct D SI1 Marquise Lab Grown Diamond

ID • D/SI1 • IGI LG803633420

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG803633420

Diamond specifications and retailer prices

From $306 USD
£241 GBP
As of October 27, 2026
Save $1,064 USD (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,370 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.58ct lab-grown marquise diamond

This 1.58ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG803633420 or 803633420. Listed at 17 retailers as of October 27, 2026, with prices from $306 to $1,370, a $1,064 spread on the same certified stone. Brilliant Earth lists it at $1,370. 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

1.58
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803633420
Dimensions11.79 × 6.18 × 3.80 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.79 mm6.18 mm1.58 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG803633420
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $1,370 USD|Low: $212 USD|High: $1,420 USD|Avg: $637 USD|-3.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 3$221 USD
Retailer 4$246 USD
Retailer 17$257 USD
Retailer 9$274 USD
Retailer 11$306 USD
Retailer 10$443 USD
Retailer 16$468 USD
Retailer 12$507 USD
Retailer 6$531 USD
Retailer 7$552 USD
Retailer 2$564 USD
Retailer 15$715 USD
Retailer 5$882 USD
Retailer 8$889 USD
Retailer 13$1,101 USD
Retailer 14$1,110 USD
Brilliant Earth$1,370 USD

41 data points across 17 retailers

17 retailers$306 USD to $1,370 USD

Retailer 1
-
$221 USD
Price last confirmed 9 days ago
Retailer 2
-
$257 USD
View
Price last confirmed 7 days ago
Retailer 3
-
$274 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$306 USD
£241 GBP
View
A
Retailer 5
-
$307 USD
HK$2,400 HKD
View
A
Retailer 6
-
$443 USD
€422 EUR
View
Retailer 7
-
$468 USD
View
Price last confirmed 7 days ago
A
Retailer 8
-
$507 USD
£399 GBP
View
A
Retailer 9
-
$531 USD
View
A
Retailer 10
-
$552 USD
View
B+
Retailer 11
-
$564 USD
A$868 AUD
View
B+
Retailer 12
-
$715 USD
View
Retailer 13
-
$882 USD
View
Price last confirmed 7 days ago
B+
Retailer 14
-
$889 USD
SGD 1,202 SGD
View
Retailer 15
-
$1,101 USD
£867 GBP
View
Price last confirmed 7 days ago
B
Retailer 16
-
$1,110 USD
View
Most Expensive
B
Brilliant Earth
19868126A · Oct 31
$1,370 USD
View
16 more retailers have this diamond
Prices start from $306 USDSave up to $1,064 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
1.58ct Marquise
$306 USD