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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

VG • H/SI2 • GIA 6412347475

Certificate GIA 6412347475

Diamond specifications and retailer prices

From $1,261 NZD
As of November 5, 2026
Save $1,302 NZD (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,394 NZD at NZ Jewellers · As of October 30, 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 very-good cut grade and certified by GIA 6412347475. Listed at 13 retailers as of November 4, 2026, with a 103% 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6412347475
Dimensions5.06 × 5.04 × 3.22 mm
L/W Ratio1.00
Top View
5.06 mm5.04 mm0.51 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6412347475
Side View
Table 57.0%Crown 35.5°Girdle: STK-THKPavilion 41.4°Culet: NoneDepth 63.8%

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 5
Current: $1,802 NZD|Low: $1,295 NZD|High: $2,598 NZD|Avg: $1,768 NZD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$1,295 NZD
Retailer 4$1,371 NZD
Retailer 7$1,456 NZD
Retailer 2$1,658 NZD
Retailer 1$1,802 NZD
Retailer 3$1,966 NZD
Retailer 5$2,563 NZD

40 data points across 7 retailers

13 retailers$1,261 NZD to $2,563 NZD

B+
Cheapest Retailer
-
$1,261 NZD
B+
Retailer 2
-
$1,295 NZD
View
Final sale: no returns
B+
Retailer 3
-
$1,371 NZD
View
Retailer 4
-
$1,402 NZD
View
Price last confirmed 53 days ago
B+
Retailer 5
-
$1,421 NZD
View
B+
Retailer 6
-
$1,456 NZD
View
Retailer 7
-
$1,616 NZD
View
Price last confirmed 10 days ago
B
Retailer 8
-
$1,640 NZD
View
B+
Retailer 9
-
$1,658 NZD
View
B
Retailer 10
-
$1,802 NZD
View
B
Retailer 11
-
$1,966 NZD
View
B
Retailer 12
-
$2,563 NZD
View
Most Expensive
NZ Jewellers
5361b433-df0f-4f78-8a84-cfd578b6f97c · Oct 30
$4,394 NZD
$2,436 USD
View
Price under review
12 more retailers have this diamond
Prices start from $1,261 NZDSave up to $1,302 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 Round
$1,261 NZD