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Cushion|Lab Grown|IGI

2.50ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG628465174

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG628465174

Diamond specifications and retailer prices

From €308 EUR
HK$2,700 HKD
As of November 1, 2026
Save €1,537 EUR (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,846 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.5ct lab-grown cushion diamond

This 2.5ct lab-grown cushion sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG628465174 or 628465174. Listed at 13 retailers as of October 31, 2026, with prices from €308 to €1,846, a €1,537 spread on the same certified stone. Brilliant Earth lists it at €1,846. 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

2.50
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.3°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628465174
Dimensions9.14 × 6.74 × 4.70 mm
L/W Ratio1.36
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
9.14 mm6.74 mm2.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628465174
Side View
Table 62.0%Crown 31.3°Girdle: STK-THKPavilion 33.6°Culet: NoneDepth 69.7%

Caratlytics Score

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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: Nov 1
Current: €1,846 EUR|Low: €250 EUR|High: €1,846 EUR|Avg: €694 EUR
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
October 31, 2026
Retailer 6€250 EUR
Retailer 3€308 EUR
Retailer 12€344 EUR
Retailer 9€415 EUR
Retailer 2€435 EUR
Retailer 13€465 EUR
Retailer 10€524 EUR
Retailer 5€547 EUR
Retailer 4€687 EUR
Retailer 7€691 EUR
Retailer 8€881 EUR
Retailer 14€1,123 EUR
Retailer 11€1,449 EUR
Brilliant Earth€1,846 EUR

39 data points across 14 retailers

13 retailers€308 EUR to €1,846 EUR

A
Cheapest Retailer
-
€308 EUR
HK$2,700 HKD
Retailer 2
-
€344 EUR
£304 GBP
View
Price last confirmed 16 days ago
A
Retailer 3
-
€415 EUR
$465 USD
View
A
Retailer 4
-
€435 EUR
View
B+
Retailer 5
-
€465 EUR
$522 USD
View
A
Retailer 6
-
€524 EUR
£463 GBP
View
A
Retailer 7
-
€547 EUR
$614 USD
View
A
Retailer 8
-
€687 EUR
$770 USD
View
B+
Retailer 9
-
€691 EUR
$775 USD
View
B+
Retailer 10
-
€881 EUR
SGD 1,336 SGD
View
Retailer 11
-
€1,123 EUR
£992 GBP
View
Price last confirmed 18 days ago
B
Retailer 12
-
€1,449 EUR
$1,625 USD
View
Most Expensive
B
Brilliant Earth
14415511A · Oct 31
€1,846 EUR
$2,070 USD
View
12 more retailers have this diamond
Prices start from €308 EURSave up to €1,537 EUR

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
2.50ct Cushion
€308 EUR