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Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6555499715

Certificate GIA 6555499715

Diamond specifications and retailer prices

From $987 NZD
As of November 6, 2026
Save $1,479 NZD (60%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,355 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555499715. Listed at 15 retailers as of November 4, 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. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555499715
Dimensions6.50 × 4.50 × 2.77 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.50 mm4.50 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555499715
Side View
Table 56.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 61.5%

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: Nov 6
Current: $1,573 NZD|Low: $987 NZD|High: $2,500 NZD|Avg: $1,542 NZD|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$987 NZD
Retailer 8$1,182 NZD
Retailer 2$1,301 NZD
Retailer 5$1,416 NZD
Retailer 1$1,573 NZD
Retailer 7$1,609 NZD
Retailer 4$1,651 NZD
Retailer 3$2,466 NZD

46 data points across 8 retailers

15 retailers$987 NZD to $2,466 NZD

A
Cheapest Retailer
-
$987 NZD
Final sale: no returns
Retailer 2
-
$1,070 NZD
View
Price last confirmed 29 days ago
Retailer 3
-
$1,153 NZD
View
Price last confirmed 29 days ago
Retailer 4
-
$1,153 NZD
View
Price last confirmed 38 days ago
Retailer 5
-
$1,154 NZD
View
Price last confirmed 11 days ago
Retailer 6
-
$1,234 NZD
View
Price last confirmed 67 days ago
Retailer 7
-
$1,234 NZD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$1,301 NZD
View
B
Retailer 9
-
$1,416 NZD
View
B+
Retailer 10
-
$1,573 NZD
View
Retailer 11
-
$1,609 NZD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
$1,651 NZD
View
B
Retailer 13
-
$2,466 NZD
View
Retailer 14
-
$3,355 NZD
View
Price last confirmed 69 days ago
Most Expensive
NZ Jewellers
14c792f6-0078-4d74-b977-0c16cc58ec11 · Sep 30
$3,355 NZD
$1,860 USD
View
Price last confirmed 37 days ago
14 more retailers have this diamond
Prices start from $987 NZDSave up to $1,479 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.

A
0.51ct Oval
$987 NZD