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Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7553393622

Certificate GIA 7553393622

Diamond specifications and retailer prices

From $1,127 NZD
$635 USD
As of October 27, 2026
Save $2,660 NZD (70%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $3,786 NZD at NZ Jewellers · As of October 27, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7553393622. Listed at 24 retailers as of October 27, 2026, with prices from $1,127 to $3,786, a $2,660 spread on the same certified stone. NZ Jewellers lists it at $3,786. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7553393622
Dimensions5.08 × 5.10 × 3.21 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Cloud
Top View
5.08 mm5.10 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7553393622
Side View
Table 55.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.1%

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: Oct 27
Current: $1,613 NZD|Low: $841 NZD|High: $2,821 NZD|Avg: $1,583 NZD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 8$841 NZD
Retailer 10$1,178 NZD
Retailer 2$1,281 NZD
Retailer 4$1,428 NZD
Retailer 5$1,473 NZD
Retailer 3$1,571 NZD
Retailer 1$1,613 NZD
Retailer 9$1,815 NZD
Retailer 6$1,859 NZD
Retailer 7$2,803 NZD

35 data points across 10 retailers

24 retailers$1,127 NZD to $3,786 NZD

A
Cheapest Retailer
-
$1,127 NZD
$635 USD
A
Retailer 2
-
$1,139 NZD
$642 USD
View
Retailer 3
-
$1,178 NZD
$664 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$1,178 NZD
$664 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$1,201 NZD
$677 USD
View
B+
Retailer 6
-
$1,262 NZD
$711 USD
View
B+
Retailer 7
-
$1,281 NZD
$722 USD
View
Retailer 8
-
$1,290 NZD
$727 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$1,338 NZD
$754 USD
View
B+
Retailer 10
-
$1,384 NZD
$780 USD
View
B+
Retailer 11
-
$1,384 NZD
$780 USD
View
B+
Retailer 12
-
$1,428 NZD
$805 USD
View
B+
Retailer 13
-
$1,437 NZD
$810 USD
View
B+
Retailer 14
-
$1,445 NZD
$815 USD
View
B+
Retailer 15
-
$1,473 NZD
£654 GBP
View
B+
Retailer 16
-
$1,529 NZD
$862 USD
View
B+
Retailer 17
-
$1,571 NZD
£697 GBP
View
B+
Retailer 18
-
$1,613 NZD
€866 EUR
View
B+
Retailer 19
-
$1,682 NZD
$948 USD
View
Retailer 20
-
$1,815 NZD
A$1,574 AUD
View
Price last confirmed 29 days ago
B+
Retailer 21
-
$1,859 NZD
ZAR 16,926 ZAR
View
B
Retailer 22
-
$2,803 NZD
£1,244 GBP
View
B
Retailer 23
-
$3,468 NZD
CA$2,715 CAD
View
Most Expensive
B
NZ Jewellers
345bfcde-ed97-42b4-ac88-7a1a1bb92407 · Oct 27
$3,786 NZD
$2,134 USD
View
23 more retailers have this diamond
Prices start from $1,127 NZDSave up to $2,660 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
$1,127 NZD