Oval|Natural|GIA

20.42ct D VS1 Oval Natural Diamond

D/VS1

Diamond specifications and retailer prices

From £1,418,086 GBP
$1,888,440 USD
As of October 29, 2026
Save £56,724 GBP (4%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,474,810 GBP at Carbon Sparkle · As of October 29, 2026
View at Carbon Sparkle

About this 20.42ct natural oval diamond

This 20.42ct natural oval sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included) and certified by GIA. Listed at 2 retailers as of October 29, 2026, with a relatively tight 4% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

20.42
Carat
D
Colour
VS1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
Dimensions20.81 × 15.04 × 10.10 mm
L/W Ratio1.38
Top View
20.81 mm15.04 mm20.42 ctD / VS1
OriginNatural
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA
Side View
Table 58.0%CrownGirdlePavilionCuletDepth 67.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £1,474,810 GBP|Low: £1,284,720 GBP|High: £2,382,385 GBP|Avg: £1,551,867 GBP
Carbon Sparkle
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 16, 2026
Retailer 3£1,284,720 GBP
Retailer 5£1,361,363 GBP
Retailer 7£1,410,169 GBP
Retailer 2£1,418,086 GBP
Carbon Sparkle£1,474,810 GBP
Retailer 4£1,531,534 GBP
Retailer 6£2,382,385 GBP

4 data points across 7 retailers

2 retailers£1,418,086 GBP to £1,474,810 GBP

B+
Cheapest Retailer
-
£1,418,086 GBP
$1,888,440 USD
Most Expensive
B
Carbon Sparkle
9dec36eb-4921-4baf-8d47-f54376de1bf2 · Oct 29
£1,474,810 GBP
$1,963,978 USD
View
1 more retailer has this diamond
Prices start from £1,418,086 GBPSave up to £56,724 GBP

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.

B+
20.42ct Oval
£1,418,086 GBP