CaratHunter
Plans
Oval|Natural|GIA

0.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6515090345

Certificate GIA 6515090345

Diamond specifications and retailer prices

From $1,486 NZD
As of November 6, 2026
Save $1,767 NZD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $3,253 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded G 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 6515090345. Listed at 21 retailers as of November 4, 2026, with prices from $1,486 to $3,253, a $1,767 spread on the same certified stone. MOH London lists it at $3,253. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.03°
Pavilion angle39.22°
OriginNatural
Grading LabGIA
CertificateGIA 6515090345
Dimensions6.18 × 4.48 × 2.77 mm
L/W Ratio1.38
Top View
6.18 mm4.48 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6515090345
Side View
Table 58.0%Crown 40.03°Girdle: MED-THKPavilion 39.22°Culet: NoneDepth 61.9%

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 6
Current: $3,253 NZD|Low: $1,239 NZD|High: $3,297 NZD|Avg: $2,052 NZD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$1,486 NZD
Retailer 3$1,580 NZD
Retailer 7$1,587 NZD
Retailer 8$1,611 NZD
Retailer 4$1,762 NZD
Retailer 10$1,768 NZD
Retailer 6$1,894 NZD
Retailer 2$2,486 NZD
Retailer 11$2,652 NZD
Retailer 5$2,744 NZD
MOH London$3,253 NZD

33 data points across 11 retailers

21 retailers$1,486 NZD to $3,253 NZD

B+
Cheapest Retailer
-
$1,486 NZD
Final sale: no returns
B+
Retailer 2
-
$1,580 NZD
View
Retailer 3
-
$1,587 NZD
View
Price last confirmed 9 days ago
Retailer 4
-
$1,611 NZD
View
Price last confirmed 39 days ago
Retailer 5
-
$1,611 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$1,629 NZD
View
B+
Retailer 7
-
$1,762 NZD
View
B+
Retailer 8
-
$1,768 NZD
View
B+
Retailer 9
-
$1,791 NZD
View
Retailer 10
-
$1,858 NZD
View
Price last confirmed 38 days ago
B
Retailer 11
-
$1,858 NZD
View
B
Retailer 12
-
$1,894 NZD
View
B
Retailer 13
-
$1,894 NZD
View
B
Retailer 14
-
$1,894 NZD
View
B
Retailer 15
-
$1,966 NZD
View
B
Retailer 16
-
$2,486 NZD
View
Retailer 17
-
$2,652 NZD
View
Price last confirmed 37 days ago
B
Retailer 18
-
$2,744 NZD
View
Most Expensive
B
MOH London
3B8888A20 · Nov 4
$3,253 NZD
£1,420 GBP
View
18 more retailers have this diamond
Prices start from $1,486 NZDSave up to $1,767 NZD

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
$1,486 NZD