Cushion|Lab Grown|IGI

5.11ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG500150042

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG500150042

Diamond specifications and retailer prices

From $3,580 USD
As of November 2, 2026
Save $24,529 USD (87%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $28,109 USD at MOH London · As of November 1, 2026
View at MOH London

About this 5.11ct lab-grown cushion diamond

This 5.11ct lab-grown cushion sits in the over five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500150042 or 500150042. Listed at 7 retailers as of November 1, 2026, with prices from $3,580 to $28,109, a $24,529 spread on the same certified stone. MOH London lists it at $28,109. 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

5.11
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle29.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500150042
Dimensions9.60 × 9.42 × 6.16 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
9.60 mm9.42 mm5.11 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500150042
Side View
Table 59.0%Crown 41.5°Girdle: STK-VTKPavilion 29.4°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $28,109 USD|Low: $3,580 USD|High: $28,485 USD|Avg: $17,485 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3$3,580 USD
Retailer 7$16,364 USD
Retailer 6$17,277 USD
Retailer 8$17,335 USD
Retailer 5$17,705 USD
Retailer 4$17,895 USD
Retailer 9$19,211 USD
Retailer 2$20,652 USD
MOH London$28,109 USD

25 data points across 9 retailers

7 retailers$3,580 USD to $28,109 USD

A
Cheapest Retailer
-
$3,580 USD
B+
Retailer 2
-
$16,364 USD
View
B+
Retailer 3
-
$17,277 USD
View
Final sale: no returns
B+
Retailer 4
-
$17,705 USD
View
Retailer 5
-
$17,895 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$20,652 USD
£16,262 GBP
View
Most Expensive
B+
MOH London
LG500150042 · Nov 1
$28,109 USD
£22,133 GBP
View
6 more retailers have this diamond
Prices start from $3,580 USDSave up to $24,529 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
5.11ct Cushion
$3,580 USD