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Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557586665

Certificate GIA 2557586665

Diamond specifications and retailer prices

From $9,334 NZD
HK$41,100 HKD
As of November 1, 2026
Save $11,858 NZD (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $21,192 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557586665. Listed at 17 retailers as of October 30, 2026, with prices from $9,334 to $21,192, a $11,858 spread on the same certified stone. NZ Jewellers lists it at $21,192. 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

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557586665
Dimensions7.25 × 7.31 × 4.56 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle
Top View
7.25 mm7.31 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557586665
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.7%

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 1
Current: $21,192 NZD|Low: $9,187 NZD|High: $21,192 NZD|Avg: $13,062 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 13$9,334 NZD
Retailer 16$9,377 NZD
Retailer 5$10,012 NZD
Retailer 7$10,594 NZD
Retailer 3$11,480 NZD
Retailer 6$11,480 NZD
Retailer 15$11,480 NZD
Retailer 11$12,070 NZD
Retailer 10$12,601 NZD
Retailer 8$12,757 NZD
Retailer 17$12,757 NZD
Retailer 14$13,183 NZD
Retailer 4$13,245 NZD
Retailer 9$13,966 NZD
Retailer 2$15,302 NZD
Retailer 12$18,669 NZD
NZ Jewellers$21,192 NZD

38 data points across 17 retailers

17 retailers$9,334 NZD to $21,192 NZD

A
Cheapest Retailer
-
$9,334 NZD
HK$41,100 HKD
A
Retailer 2
-
$9,377 NZD
$5,285 USD
View
B+
Retailer 3
-
$10,012 NZD
$5,643 USD
View
B+
Retailer 4
-
$10,594 NZD
$5,971 USD
View
Final sale: no returns
B+
Retailer 5
-
$11,480 NZD
$6,470 USD
View
B+
Retailer 6
-
$11,480 NZD
$6,470 USD
View
B+
Retailer 7
-
$11,480 NZD
$6,470 USD
View
B+
Retailer 8
-
$12,070 NZD
£5,357 GBP
View
B+
Retailer 9
-
$12,601 NZD
€6,764 EUR
View
B
Retailer 10
-
$12,757 NZD
$7,190 USD
View
B+
Retailer 11
-
$12,757 NZD
$7,190 USD
View
B
Retailer 12
-
$13,183 NZD
$7,430 USD
View
B
Retailer 13
-
$13,245 NZD
$7,465 USD
View
Retailer 14
-
$13,966 NZD
$7,871 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$15,302 NZD
£6,791 GBP
View
B
Retailer 16
-
$18,669 NZD
£8,285 GBP
View
Most Expensive
B
NZ Jewellers
1b7dad14-d83a-4a6a-990d-39a4c693f98f · Oct 30
$21,192 NZD
$11,944 USD
View
16 more retailers have this diamond
Prices start from $9,334 NZDSave up to $11,858 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
1.51ct Round
$9,334 NZD