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Cushion|Lab Grown|IGI

5.51ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG722522546

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

Certificate IGI LG722522546

Diamond specifications and retailer prices

From HK$9,227 HKD
$1,176 USD
As of October 31, 2026
Save HK$44,909 HKD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: HK$54,135 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 5.51ct lab-grown cushion diamond

This 5.51ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG722522546 or 722522546. Listed at 17 retailers as of October 31, 2026, with prices from HK$9,227 to HK$54,135, a HK$44,909 spread on the same certified stone. Brilliant Earth lists it at HK$54,135. 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

5.51
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG722522546
Dimensions10.31 × 10.18 × 6.80 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.31 mm10.18 mm5.51 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG722522546
Side View
Table 61.0%Crown 36.6°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 66.8%

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: Oct 31
Current: HK$54,135 HKD|Low: HK$9,227 HKD|High: HK$105,211 HKD|Avg: HK$26,889 HKD|-48.5%
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
Retailer 18
November 1, 2026
Retailer 18HK$9,227 HKD
Retailer 6HK$9,564 HKD
Retailer 16HK$10,410 HKD
Retailer 17HK$10,670 HKD
Retailer 7HK$12,969 HKD
Retailer 2HK$13,849 HKD
Retailer 3HK$15,252 HKD
Retailer 12HK$15,693 HKD
Retailer 11HK$19,384 HKD
Retailer 13HK$19,432 HKD
Retailer 10HK$23,623 HKD
Retailer 8HK$26,425 HKD
Retailer 5HK$29,242 HKD
Retailer 4HK$29,657 HKD
Retailer 14HK$32,483 HKD
Retailer 9HK$33,392 HKD
Retailer 15HK$45,897 HKD
Brilliant EarthHK$54,135 HKD

40 data points across 18 retailers

17 retailersHK$9,227 HKD to HK$54,135 HKD

A
Cheapest Retailer
-
HK$9,227 HKD
$1,176 USD
Final sale: no returns
Retailer 2
-
HK$9,564 HKD
$1,219 USD
View
Price last confirmed 21 days ago
Retailer 3
-
HK$10,410 HKD
£1,045 GBP
View
Price last confirmed 15 days ago
A
Retailer 4
-
HK$10,670 HKD
$1,360 USD
View
A
Retailer 5
-
HK$12,969 HKD
$1,653 USD
View
A
Retailer 6
-
HK$13,849 HKD
£1,390 GBP
View
A
Retailer 7
-
HK$15,252 HKD
$1,944 USD
View
A
Retailer 8
-
HK$15,693 HKD
€1,905 EUR
View
A
Retailer 9
-
HK$19,384 HKD
A$3,801 AUD
View
A
Retailer 10
-
HK$19,432 HKD
ZAR 40,013 ZAR
View
B+
Retailer 11
-
HK$23,623 HKD
$3,011 USD
View
B+
Retailer 12
-
HK$29,242 HKD
$3,727 USD
View
B+
Retailer 13
-
HK$29,657 HKD
$3,780 USD
View
B+
Retailer 14
-
HK$32,483 HKD
£3,260 GBP
View
B+
Retailer 15
-
HK$33,392 HKD
$4,256 USD
View
Retailer 16
-
HK$45,897 HKD
$5,850 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
15673761A · Oct 31
HK$54,135 HKD
$6,900 USD
View
16 more retailers have this diamond
Prices start from HK$9,227 HKDSave up to HK$44,909 HKD

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
5.51ct Cushion
HK$9,227 HKD