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Oval|Natural|GIA

0.40ct I SI2 Oval Natural Diamond

GD • I/SI2 • GIA 2557857621

Certificate GIA 2557857621

Diamond specifications and retailer prices

From £308 GBP
$413 USD
As of October 30, 2026
Save £572 GBP (65%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £880 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

About this 0.4ct natural oval diamond

This 0.4ct natural oval sits in the sub-half-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2557857621. Listed at 7 retailers as of October 30, 2026, with prices from £308 to £880, a £572 spread on the same certified stone. Diamond Exchange Canada lists it at £880. 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

0.40
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557857621
Dimensions5.98 × 4.00 × 2.55 mm
L/W Ratio1.50
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
5.98 mm4.00 mm0.40 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 2557857621
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.7%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: £880 GBP|Low: £308 GBP|High: £880 GBP|Avg: £515 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 5£308 GBP
Retailer 6£367 GBP
Retailer 7£388 GBP
Retailer 3£506 GBP
Retailer 2£507 GBP
Retailer 4£736 GBP
Diamond Exchange Canada£880 GBP

38 data points across 7 retailers

7 retailers£308 GBP to £880 GBP

B+
Cheapest Retailer
-
£308 GBP
$413 USD
B
Retailer 2
-
£367 GBP
$491 USD
View
B
Retailer 3
-
£388 GBP
$520 USD
View
C
Retailer 4
-
£506 GBP
View
C
Retailer 5
-
£507 GBP
€647 EUR
View
Retailer 6
-
£736 GBP
View
Price last confirmed 21 days ago
Most Expensive
C
Diamond Exchange Canada
1981546507 · Oct 30
£880 GBP
CA$1,638 CAD
View
6 more retailers have this diamond
Prices start from £308 GBPSave up to £572 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+
0.40ct Oval
£308 GBP