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Oval|Natural|GIA

0.51ct I SI2 Oval Natural Diamond

GD • I/SI2 • GIA 6542691720

Certificate GIA 6542691720

Diamond specifications and retailer prices

From £190 GBP
₹24,287 INR
As of October 26, 2026
Save £261 GBP (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £451 GBP at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter 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 6542691720. Listed at 7 retailers as of October 26, 2026, with prices from £190 to £451, a £261 spread on the same certified stone. 77 Diamonds lists it at £451. 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

0.51
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6542691720
Dimensions5.97 × 4.34 × 2.93 mm
L/W Ratio1.38
Top View
5.97 mm4.34 mm0.51 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6542691720
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

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 26
Current: £451 GBP|Low: £189 GBP|High: £460 GBP|Avg: £288 GBP|-0.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2£190 GBP
Retailer 5£220 GBP
Retailer 3£250 GBP
Retailer 7£261 GBP
Retailer 6£274 GBP
Retailer 4£348 GBP
77 Diamonds£451 GBP

45 data points across 7 retailers

7 retailers£190 GBP to £451 GBP

A
Cheapest Retailer
-
£190 GBP
₹24,287 INR
B+
Retailer 2
-
£220 GBP
HK$2,300 HKD
View
B+
Retailer 3
-
£250 GBP
SGD 452 SGD
View
B+
Retailer 4
-
£261 GBP
$350 USD
View
B+
Retailer 5
-
£274 GBP
SGD 497 SGD
View
B+
Retailer 6
-
£348 GBP
$467 USD
View
Most Expensive
B+
77 Diamonds
OVCPYVAPBXTW · Nov 1
£451 GBP
View
6 more retailers have this diamond
Prices start from £190 GBPSave up to £261 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.

A
0.51ct Oval
£190 GBP