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Round|Natural|GIA

4.21ct I VS1 Round Natural Diamond

EX • I/VS1 • GIA 6542806446

Certificate GIA 6542806446

Diamond specifications and retailer prices

From HK$494,483 HKD
$63,026 USD
As of October 31, 2026
Save HK$347,996 HKD (41%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$842,479 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 4.21ct natural round diamond

This 4.21ct natural round sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by GIA 6542806446. Listed at 13 retailers as of October 31, 2026, with prices from HK$494,483 to HK$842,479, a HK$347,996 spread on the same certified stone. MOH London lists it at HK$842,479. At this carat range, natural pricing varies dramatically across retailers, so the cross-retailer spread on this exact stone is your single best indicator of fair price.

The 4Cs

4.21
Carat
I
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542806446
Dimensions10.25 × 10.33 × 6.37 mm
L/W Ratio1.01
Top View
10.25 mm10.33 mm4.21 ctI / VS1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542806446
Side View
Table 58.0%CrownGirdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.8%

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 31
Current: HK$842,479 HKD|Low: HK$518,435 HKD|High: HK$852,633 HKD|Avg: HK$607,025 HKD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4HK$518,435 HKD
Retailer 3HK$537,172 HKD
Retailer 8HK$541,957 HKD
Retailer 7HK$561,917 HKD
Retailer 5HK$572,815 HKD
Retailer 6HK$605,860 HKD
Retailer 2HK$651,625 HKD
MOH LondonHK$842,479 HKD

39 data points across 8 retailers

13 retailersHK$494,483 HKD to HK$842,479 HKD

A
Cheapest Retailer
-
HK$494,483 HKD
$63,026 USD
Final sale: no returns
A
Retailer 2
-
HK$506,332 HKD
CA$89,634 CAD
View
A
Retailer 3
-
HK$515,533 HKD
$65,709 USD
View
A
Retailer 4
-
HK$518,435 HKD
$66,079 USD
View
A
Retailer 5
-
HK$537,172 HKD
£53,911 GBP
View
A
Retailer 6
-
HK$541,957 HKD
$69,077 USD
View
B+
Retailer 7
-
HK$561,917 HKD
$71,621 USD
View
B+
Retailer 8
-
HK$572,815 HKD
$73,010 USD
View
B+
Retailer 9
-
HK$594,845 HKD
$75,818 USD
View
B+
Retailer 10
-
HK$605,860 HKD
$77,222 USD
View
B+
Retailer 11
-
HK$628,127 HKD
$80,060 USD
View
B+
Retailer 12
-
HK$651,625 HKD
€79,100 EUR
View
Most Expensive
B
MOH London
81249B3E5 · Nov 1
HK$842,479 HKD
£84,552 GBP
View
12 more retailers have this diamond
Prices start from HK$494,483 HKDSave up to HK$347,996 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 Round
HK$494,483 HKD