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Cushion|Lab Grown|IGI

4.21ct F VVS1 Cushion Lab Grown Diamond

VG • F/VVS1 • IGI LG835670909

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

Certificate IGI LG835670909

Diamond specifications and retailer prices

From HK$9,282 HKD
$1,183 USD
As of November 1, 2026
Save HK$65,648 HKD (88%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$74,930 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 4.21ct lab-grown cushion diamond

This 4.21ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG835670909 or 835670909. Listed at 19 retailers as of November 1, 2026, with prices from HK$9,282 to HK$74,930, a HK$65,648 spread on the same certified stone. Brilliant Earth lists it at HK$74,930. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.21
Carat
F
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle28.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG835670909
Dimensions9.35 × 9.05 × 5.65 mm
L/W Ratio1.03
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.35 mm9.05 mm4.21 ctF / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG835670909
Side View
Table 65.0%Crown 38.6°Girdle: STK-THKPavilion 28.6°Culet: NoneDepth 62.4%

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 1
Current: HK$74,930 HKD|Low: HK$9,282 HKD|High: HK$74,930 HKD|Avg: HK$25,148 HKD|+19.1%
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
Retailer 19
November 3, 2026
Retailer 7HK$9,282 HKD
Retailer 14HK$10,522 HKD
Retailer 17HK$10,788 HKD
Retailer 10HK$11,848 HKD
Retailer 3HK$13,707 HKD
Retailer 11HK$14,766 HKD
Retailer 12HK$15,087 HKD
Retailer 6HK$17,183 HKD
Retailer 2HK$22,166 HKD
Retailer 16HK$22,292 HKD
Retailer 9HK$27,540 HKD
Retailer 5HK$28,594 HKD
Retailer 19HK$28,698 HKD
Retailer 15HK$30,741 HKD
Retailer 13HK$33,431 HKD
Retailer 18HK$36,663 HKD
Retailer 8HK$62,450 HKD
Retailer 4HK$63,789 HKD
Brilliant EarthHK$74,930 HKD

30 data points across 19 retailers

19 retailersHK$9,282 HKD to HK$74,930 HKD

A
Cheapest Retailer
-
HK$9,282 HKD
$1,183 USD
Final sale: no returns
A
Retailer 2
-
HK$10,522 HKD
£1,056 GBP
View
A
Retailer 3
-
HK$10,788 HKD
$1,375 USD
View
A
Retailer 4
-
HK$11,848 HKD
$1,510 USD
View
A
Retailer 5
-
HK$12,334 HKD
$1,572 USD
View
B+
Retailer 6
-
HK$14,766 HKD
$1,882 USD
View
B+
Retailer 7
-
HK$15,087 HKD
£1,514 GBP
View
B+
Retailer 8
-
HK$17,183 HKD
$2,190 USD
View
B+
Retailer 9
-
HK$22,166 HKD
ZAR 45,640 ZAR
View
B+
Retailer 10
-
HK$22,292 HKD
A$4,371 AUD
View
B
Retailer 11
-
HK$27,540 HKD
$3,510 USD
View
B
Retailer 12
-
HK$28,594 HKD
$3,644 USD
View
B
Retailer 13
-
HK$28,698 HKD
£2,880 GBP
View
B
Retailer 14
-
HK$30,741 HKD
£3,085 GBP
View
B
Retailer 15
-
HK$33,431 HKD
£3,355 GBP
View
B
Retailer 16
-
HK$36,663 HKD
$4,673 USD
View
B
Retailer 17
-
HK$62,450 HKD
$7,959 USD
View
B
Retailer 18
-
HK$63,789 HKD
$8,130 USD
View
Most Expensive
B
Brilliant Earth
22270103A · Nov 2
HK$74,930 HKD
$9,550 USD
View
18 more retailers have this diamond
Prices start from HK$9,282 HKDSave up to HK$65,648 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
4.21ct Cushion
HK$9,282 HKD