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Oval|Natural|GIA

0.51ct H SI2 Oval Natural Diamond

GD • H/SI2 • GIA 1525115355

Certificate GIA 1525115355

Diamond specifications and retailer prices

From $929 NZD
As of November 6, 2026
Save $1,396 NZD (60%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,157 NZD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded H 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 1525115355. Listed at 12 retailers as of November 2, 2026, with a 150% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1525115355
Dimensions6.86 × 4.35 × 2.69 mm
L/W Ratio1.58
Key to symbols
Crystal, Feather
Top View
6.86 mm4.35 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1525115355
Side View
Table 54.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 61.8%

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: $1,138 NZD|Low: $851 NZD|High: $2,352 NZD|Avg: $1,291 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 6$929 NZD
Retailer 9$1,007 NZD
Retailer 2$1,084 NZD
Retailer 7$1,122 NZD
Retailer 1$1,138 NZD
Retailer 10$1,162 NZD
Retailer 3$1,257 NZD
Retailer 8$1,317 NZD
Retailer 5$1,494 NZD
Retailer 4$2,325 NZD

41 data points across 10 retailers

12 retailers$929 NZD to $2,325 NZD

B+
Cheapest Retailer
-
$929 NZD
Final sale: no returns
Retailer 2
-
$1,007 NZD
View
Price last confirmed 30 days ago
Retailer 3
-
$1,084 NZD
View
Price last confirmed 30 days ago
Retailer 4
-
$1,084 NZD
View
Price last confirmed 39 days ago
B+
Retailer 5
-
$1,131 NZD
View
Retailer 6
-
$1,138 NZD
View
Retailer 7
-
$1,162 NZD
View
Price last confirmed 39 days ago
B
Retailer 8
-
$1,243 NZD
View
B
Retailer 9
-
$1,257 NZD
View
B
Retailer 10
-
$1,494 NZD
View
C
Retailer 11
-
$2,325 NZD
View
Most Expensive
NZ Jewellers
16861eeb-55f2-43ac-b2ba-983adf7bd2fb · Sep 30
$3,157 NZD
$1,750 USD
View
Price last confirmed 38 days ago
11 more retailers have this diamond
Prices start from $929 NZDSave up to $1,396 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
$929 NZD