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Cushion|Lab Grown|IGI

5.28ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG780663589

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG780663589

Diamond specifications and retailer prices

From $6,255 USD
As of October 29, 2026
Save $25,767 USD (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $32,022 USD at With Clarity · As of October 30, 2026
View at With Clarity

About this 5.28ct lab-grown cushion diamond

This 5.28ct lab-grown cushion sits in the over five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780663589 or 780663589. Listed at 13 retailers as of October 29, 2026, with prices from $6,255 to $32,022, a $25,767 spread on the same certified stone. With Clarity lists it at $32,022. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.28
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663589
Dimensions11.36 × 9.42 × 6.23 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.36 mm9.42 mm5.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663589
Side View
Table 60.0%Crown 37°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 66.1%

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: Oct 29
Current: $16,800 USD|Low: $6,033 USD|High: $35,865 USD|Avg: $14,887 USD|-15.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
October 30, 2026
Retailer 2$6,255 USD
Retailer 7$7,578 USD
Retailer 5$7,677 USD
Retailer 10$8,225 USD
Retailer 3$9,846 USD
Retailer 8$9,961 USD
Retailer 12$10,610 USD
Retailer 9$13,946 USD
Retailer 1$16,800 USD
Retailer 4$18,586 USD
Retailer 11$19,362 USD
Retailer 6$21,450 USD
With Clarity$32,022 USD

38 data points across 13 retailers

13 retailers$6,255 USD to $32,022 USD

A
Cheapest Retailer
-
$6,255 USD
A
Retailer 2
-
$7,578 USD
HK$59,200 HKD
View
A
Retailer 3
-
$7,677 USD
£6,045 GBP
View
Retailer 4
-
$8,225 USD
View
Price last confirmed 9 days ago
A
Retailer 5
-
$9,846 USD
View
A
Retailer 6
-
$9,961 USD
€9,487 EUR
View
A
Retailer 7
-
$10,610 USD
View
A
Retailer 8
-
$13,946 USD
£10,981 GBP
View
B+
Retailer 9
-
$16,800 USD
View
B+
Retailer 10
-
$18,586 USD
View
Retailer 11
-
$19,362 USD
A$29,788 AUD
View
Price last confirmed 21 days ago
B+
Retailer 12
-
$21,450 USD
View
Most Expensive
B
With Clarity
780663589 · Oct 30
$32,022 USD
View
12 more retailers have this diamond
Prices start from $6,255 USDSave up to $25,767 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
5.28ct Cushion
$6,255 USD