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Oval|Natural|GIA

0.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1518159213

Certificate GIA 1518159213

Diamond specifications and retailer prices

From £459 GBP
As of November 7, 2026
Save £176 GBP (28%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £635 GBP at Reeds · As of November 7, 2026
View at Reeds

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1518159213. Listed at 5 retailers as of November 7, 2026, with prices from £459 to £635, a £176 spread on the same certified stone. Reeds lists it at £635. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1518159213
Dimensions6.92 × 4.30 × 2.72 mm
L/W Ratio1.61
Girdle conditionFaceted
Top View
6.92 mm4.30 mm0.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1518159213
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.2%

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: Nov 7
Current: £635 GBP|Low: £418 GBP|High: £671 GBP|Avg: £520 GBP
Reeds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 6£418 GBP
Retailer 2£459 GBP
Retailer 4£501 GBP
Retailer 5£501 GBP
Retailer 3£516 GBP
Reeds£635 GBP
Retailer 7£671 GBP

2 data points across 7 retailers

5 retailers£459 GBP to £635 GBP

B+
Cheapest Retailer
-
£459 GBP
B
Retailer 2
-
£501 GBP
View
B
Retailer 3
-
£501 GBP
View
B
Retailer 4
-
£516 GBP
View
Most Expensive
B
Reeds
01-09906470 · Nov 7
£635 GBP
$850 USD
View
4 more retailers have this diamond
Prices start from £459 GBPSave up to £176 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+
0.51ct Oval
£459 GBP