CaratHunter
Plans
Oval|Natural|GIA

0.40ct J SI1 Oval Natural Diamond

GD • J/SI1 • GIA 1269257307

Certificate GIA 1269257307

Diamond specifications and retailer prices

From £371 GBP
$497 USD
As of October 31, 2026
Save £69 GBP (16%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £440 GBP at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 0.4ct natural oval diamond

This 0.4ct natural oval sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1269257307. Listed at 2 retailers as of October 30, 2026, with prices from £371 to £440, a £69 spread on the same certified stone. 77 Diamonds lists it at £440. 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
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryFair
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1269257307
Dimensions5.65 × 3.98 × 2.60 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizeNone
Top View
5.65 mm3.98 mm0.40 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryFair
FluorescenceNone
CertificateGIA 1269257307
Side View
Table 56.0%CrownGirdlePavilionCulet: NoneDepth 65.4%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £440 GBP|Low: £366 GBP|High: £529 GBP|Avg: £406 GBP|-16.9%
77 Diamonds
Retailer 2
October 30, 2026
Retailer 2£371 GBP
77 Diamonds£440 GBP

29 data points across 2 retailers

2 retailers£371 GBP to £440 GBP

B
Cheapest Retailer
-
£371 GBP
$497 USD
Most Expensive
C
77 Diamonds
OVTVSMJBKZAJA · Oct 30
£440 GBP
View
1 more retailer has this diamond
Prices start from £371 GBPSave up to £69 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
£371 GBP