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Cushion|Lab Grown|IGI

6.39ct F VVS1 Cushion Lab Grown Diamond

EX • F/VVS1 • IGI LG670463837

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG670463837

Diamond specifications and retailer prices

From HK$20,447 HKD
$2,606 USD
As of November 1, 2026
Save HK$68,842 HKD (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: HK$118,162 HKD at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 6.39ct lab-grown cushion diamond

This 6.39ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG670463837 or 670463837. Listed at 5 retailers as of November 1, 2026, with a 337% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

6.39
Carat
F
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670463837
Dimensions12.62 × 10.12 × 6.53 mm
L/W Ratio1.25
Girdle conditionFaceted
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
12.62 mm10.12 mm6.39 ctF / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670463837
Side View
Table 62.0%Crown 35.4°Girdle: MED-STKPavilion 38°Culet: NoneDepth 64.5%

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 1
Current: HK$118,162 HKD|Low: HK$20,447 HKD|High: HK$288,715 HKD|Avg: HK$87,124 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 4HK$20,447 HKD
Retailer 8HK$21,341 HKD
Retailer 7HK$32,169 HKD
Retailer 2HK$39,191 HKD
Retailer 10HK$40,674 HKD
Retailer 5HK$51,520 HKD
Retailer 6HK$61,796 HKD
Retailer 11HK$77,922 HKD
Brilliant EarthHK$118,162 HKD
Retailer 9HK$183,677 HKD
Retailer 3HK$288,715 HKD

2 data points across 11 retailers

5 retailersHK$20,447 HKD to HK$89,289 HKD

A
Cheapest Retailer
-
HK$20,447 HKD
$2,606 USD
B
Retailer 2
-
HK$39,191 HKD
$4,995 USD
View
Retailer 3
-
HK$51,520 HKD
$6,566 USD
View
Price last confirmed 91 days ago
B
Retailer 4
-
HK$89,289 HKD
$11,380 USD
View
Most Expensive
Brilliant Earth
17792836Y · Oct 18
HK$118,162 HKD
$15,060 USD
View
Price last confirmed 15 days ago
4 more retailers have this diamond
Prices start from HK$20,447 HKDSave up to HK$68,842 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
6.39ct Cushion
HK$20,447 HKD