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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7553746149

Certificate GIA 7553746149

Diamond specifications and retailer prices

From $1,214 NZD
As of November 4, 2026
Save $1,445 NZD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,560 NZD at NZ Jewellers · As of September 23, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7553746149. Listed at 18 retailers as of November 4, 2026, with a 119% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7553746149
Dimensions5.13 × 5.16 × 3.15 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.13 mm5.16 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7553746149
Side View
Table 58.0%CrownGirdle: Med. - Sli. ThickPavilionCulet: NoneDepth 61.2%

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 4
Current: $1,833 NZD|Low: $1,113 NZD|High: $3,608 NZD|Avg: $1,988 NZD|+1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 7$1,214 NZD
Retailer 8$1,293 NZD
Retailer 6$1,317 NZD
Retailer 3$1,723 NZD
Retailer 1$1,833 NZD
Retailer 2$2,038 NZD
Retailer 4$2,659 NZD
Retailer 5$3,595 NZD

42 data points across 8 retailers

18 retailers$1,214 NZD to $2,659 NZD

A
Cheapest Retailer
-
$1,214 NZD
Final sale: no returns
B+
Retailer 2
-
$1,293 NZD
View
Retailer 3
-
$1,317 NZD
View
Price last confirmed 8 days ago
Retailer 4
-
$1,317 NZD
View
Price last confirmed 29 days ago
Retailer 5
-
$1,317 NZD
View
Price last confirmed 60 days ago
Retailer 6
-
$1,367 NZD
View
Price last confirmed 15 days ago
Retailer 7
-
$1,367 NZD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$1,508 NZD
View
Retailer 9
-
$1,521 NZD
View
Price last confirmed 53 days ago
Retailer 10
-
$1,521 NZD
View
Price last confirmed 44 days ago
Retailer 11
-
$1,521 NZD
View
Price last confirmed 60 days ago
B+
Retailer 12
-
$1,723 NZD
View
B
Retailer 13
-
$1,833 NZD
View
B
Retailer 14
-
$2,038 NZD
View
B
Retailer 15
-
$2,659 NZD
View
Retailer 16
-
$3,595 NZD
View
Price last confirmed 9 days ago
Retailer 17
-
$4,560 NZD
View
Price under review
Most Expensive
NZ Jewellers
da7f7d1e-7845-44d1-a0cb-83f959df6e4b · Sep 23
$4,560 NZD
$2,528 USD
View
Price under review
17 more retailers have this diamond
Prices start from $1,214 NZDSave up to $1,445 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 Round
$1,214 NZD